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Road Frames

$1,599.00
The Road Logic offers a riding experience that's steeped with more than 50 years of life experiences, framebuilding heritage, innovation and exploration. The beauty of its classic lines unites with modern building techniques and proven materials to deliver a contemporary bicycle that's remarkably comfortable for long days in the saddle, nimble and stiff enough to win the sprint for that sign, and adequately adaptable to endure roads that might lack proper pavement. Tom Ritchey's framebuilding experience started in the 1970s when he built his first road frame in his parent's garage in northern California. Since then, Tom has continued to explore, experience and innovate in ways that define the craft. The Road Logic is the result of Tom's expanding legacy, his prodigious experience with steel, and mastery of the subtleties and details gleaned from his tenure in the art of creating bicycles. A true modern classic, Tom designed a heat-treated and triple-butted Ritchey Logic tubeset for the Road Logic, featuring aggressively short-butted sections optimized for TIG welding that save weight and improve ride quality. Ritchey’s proprietary forged-and-machined integrated headtube uses standard drop-in bearings and saves 80 grams over a standard head tube design. Wrapped in a delicious Sally’s Macarons coat of paint, the Road Logic also features spacing for up to 30c tires and a Ritchey Carbon Fork that will ensure a lifetime of enjoyable pedal turns. - Heat-treated, triple-butted Ritchey Logic tube set features short-butted sections optimized to save weight and improve ride quality - Painted to match Ritchey full carbon fork included - Forged and machined straight head tube - Standard road spacing on frame and fork - TIG welded - Fits tires up to 30c - Logic Zero WCS drop in 1-1/8" headset included
$399.99
This is a frameset that can be ridden hard and put away wet. We use Tange tubing because it’s got a heritage of quality and a responsive feel. We know that the everyday cyclist needs a bike they can count on, day in and day out. From there we offered a bike that everyone could get behind: a solid platform for a multitude of fixed and single-speed builds. The beauty of the frame for us is that it keeps the track spirit, yet has never limited itself. The latest update is tweaked to fit fatter tires in case you want to try to track across. It also has an anti-rust coating on the interior of the tubes. If you choose to put brakes on, get the 57mm reach, not 49mm. We no longer have a 61cm size, but we have re-designed our smallest size with a sloping top tube to fit shorter riders. Uber-affordable track frame with full CrMo construction and plain gauge tubes - Responsive semi-track geometry with horizontal 120mm spaced track dropouts - Drilled for the rear brake, 57mm long reach, but no cable guides - Clearance for 32mm tires - Anti-rust coating applied to the interior of the tubes - Removable decals
$1,100.00 - $1,129.99
The perfect escape vehicle. If it’s marked on the map, the Beyond can probably follow it. Sporting multiple frame and fork mounting points and mountain bike-width tire clearance, it’s a reliable companion for days, weeks, or months spent in the middle of nowhere.
$1,199.99
Putting more air between you and the trial, the Hook EXT is the choice when you're unsure of the terrain, or know you want to cut loose. The Hook's hoodlum tendencies given free rein. Using a Columbus steel frame, dedicated carbon fork, and lively 27.5-inch wheels, the EXT can batter through territory out-of-bounds to other drop handlebar bikes. As capable on backcountry campouts as it is on post-work blasts, the Hook EXT remains the choice when you're unsure of the terrain, but know you want to have fun riding it. HIGHLIGHTS - Columbus Cromor double-butted frame - Full carbon tapered fork with internal light cable routing, through axles and triple cage mounts. - Integrated light cable routing and rear light mount. - Toptube bag direct mounts, triple cage mount on downtube and seattube for optimized bottle position, bottle cage mounts underneath the downtube, and rear rack mounts. - Front derailleur compatible. - 12 mm through axles front and rear.
$3,199.99
The heart of a light and versatile expedition bike, and the endpoint of our Hook platform. This titanium version retains the vigor of our hooligan tourer and distills it into a light and comfortable frame. Able to accommodate multiple-wheel sizes, along with myriad luggage configurations, it’s ready to be the centerpiece in any number of different builds. Paired with our light yet staunch full-carbon EXT V2 fork, this provides triple cage mounts, along with steadfast handling in rough conditions. HIGHLIGHTS: - Titanium 3Al-2.5V frame with T47 BB shell fender mounts and through axles. - Full carbon tapered fork with internal light cable routing, through axles and triple cage mounts. - Sram UDH derailleur hanger. - Toptube bag direct mounts, triple cage mounts on downtube and seattube for optimized bottle position, bottle cage mounts underneath the downtube, and rear rack mounts. - CNC yoke for maximum tire and chainring clearance. - Ovalized toptube for supreme steering precision and comfort. - Biaxially ovalized downtube for optimized power transfer and steering precision. - Front derailleur compatible. - 12 mm through axles front and rear.
$449.99
Soma's Double Cross Disc Frame is a great do-all frame. Ready for cross, trail-riding, commuting and loaded touring. The Double Cross Disc is disc-specific. Don't worry about finding the right fit, it comes in a wide range of sizes to fit you right -- up to 66cm! - Clearance for 700x41c tires w/o fenders - Rear hub spacing is 135mm
$429.99
Soma's Smoothie road race frame is agile and responsive. Excellent for stage races and competitive club rides. But also comfortable enough for daily commutes and charity rides. The semi-compact geometry allows for more standover clearance and fitting options, but they don't cheat you by only offering 4 sizes. - Based on modern road geometry, the Smoothie is speedy and nimble - Tange Prestige heat-treated butted CrMo steel; butted CrMo rear end - Rear rack and fender mounts - Compact-style geometry
$5,100.00
Ritte custom double butted titanium frameset
$3,000.00
Do you dream of your perfect gravel bike? The high modulus carbon 765 GRAVEL RS frameset is the perfect base for the ultimate custom ride to take on your next off-road adventures. The 765 GRAVEL RS is the child prodigy that, from a very young age, has benefitted from all of LOOK's expertise! Its secret ambition is to become the master of the garage, as it ultimately wants to replace every other bike. This bike is ultra-versatile. Within the wider GRAVEL family, there are 3 subsets emerging: racing, ultra-endurance, and travel. The ability to make use of off-road trails constitutes an infinite extension of its playing field. Thanks to the internet and the community effect, planning an impromptu weekend trip is quick and easy. Itineraries are discussed, designed, and shared. The light and sturdy 765 GRAVEL RS bike is a genuine innovation when it comes to pushing your limits and experiencing adventure! Cycling needs to reinvent itself, to open itself up to new possibilities. Those who practice the sport need to be surprised, to experience a change of scenery, and most of all, to be challenged both physically and mentally.
$4,000.00
The 785 HUEZ RS DISC frameset is the perfect base for your future custom bike. This Very High Modulus carbon fiber model allows you to mount a mechanical or electronic groupset with flat-mount disc brakes. The 785 HUEZ RS utilizes an elegant, well-thought-out design to create a frame that is incredibly lightweight and efficient, from the high mountains to the windswept plains. The LOOK designers and engineers wanted, above all, to make the bike as light as possible, with optimal handling and a focus on pedaling efficiency. It's been designed with tube shapes that strike a balance between ride comfort and efficient transfer of power from the pedals to the rear wheel. The efficiency and comfort found in the frame do not come at the expense of extra weight, making it possible to build a bike under 5.9 kg.
$2,300.00
The 875 MADISON RS is designed to be as efficient on the road as on the track, and our LOOK CRIT TEAM will not tell you otherwise. Thanks to the brake-ready fork and rear bridge, you can safely cruise the city streets on your fixed gear or single-speed machine. A twist of an Allen key is enough to remove the brakes and hit the boards of the velodrome. Representing the versatility and performance of the LOOK brand, this limited-edition does nothing more and nothing less than invite you to imitate our CRIT team.
$2,699.00
The Hakka MX is our answer to the Swiss Army Knife. It’s good to have options. With the Hak­ka MX, you can run road, cross and grav­el friend­ly 700c wheels, or if you are into burli­er back­coun­try explo­ration, go with 27.5/650b. With the Hak­ka MX, you don’t have to pick one tire option or the oth­er. Our sub­tle sculpt­ed chain­stays give the frame clear­ance for up to 700 x 40c or 27.5 x 2.1” tires.
$2,700.00
HAUL ASS, NOT CARGO A new breed of rider is emerging-one who loves the freedom and exploration that gravel culture was founded upon but who has a hunger to ride hard, to go all out, and to explore not just geography but personal limits. This frontier requires a new kind of gravel machine, one engineered not to roam the trails, but to race them. For these athletes, we engineered Aspero for pure, unapologetic speed, ready to take down finish lines, KOMs, PRs, and FKTs. A bike built without limits, for the riders looking to test them. It's stiff, Classics-racing stiff, and performs like you'd want a road bike to perform off-road. We think that makes sense, and it's what we were trying to do when we were stuffing bigger tires into our existing frames and swapping in aftermarket forks to get a 40mm tire up front. The flip-chip in the fork-we call it the Trail Mixer-keeps the trail measurement consistent whether you choose 700c or 650b tires. This maintains the bike's personality and handling characteristics when you switch from mid-fats to full-fat. There are as many different ways to do gravel as there are gravel bikes these days, but if you're toeing the start line, looking to stay with the lead group, and contend for the victory, Aspero is the bike to get you there.
$5,000.00
A NEW BIKE FOR CLASSIC RIDES We don't see road bikes as delicate machines meant only for putting watts into and receiving speed from. They're an extension of our soul, of the way we want to see our worlds, and the lives we want to live. Sometimes that means cutting across park grass, and sometimes it's seeing where that dirt road off to the left leads you. The Caledonia-5 is a bike for the modern road rider. The Caledonia is the bike we keep reaching for when we know the odometer's going well past the triple-digit mark. Long rides invariably have some smooth tarmac, some junk pavement over backroads, a cutty singletrack connector, and maybe even your own local Strade Bianche sector. So we built a bike that could take on all of them, do it well, and fit fenders in case the ominous clouds turn into a downpour 130km into your day. We developed the Caledonia-5 in collaboration with our World Tour riders to satisfy the need for a dedicated cobbles bike. Faster handling isn't necessarily better-we engineered the handling based on the specific use-case. In this case, it's Roubaix. Roubaix is harder on bikes than any other race on the calendar, and there's zero margin for error. We increased the rear center, lowered the BB, and increased the trail. The handling is still fast, but we've added stability. Modern road riders are looking for bikes to handle long-distance, high pace, no limits, and offer maximum fun. By placing lower modulus carbon in key areas to mitigate the brittleness of hi-mod fiber-the Caledonia delivers performance, comfort, and speed. Oh, and you can fit a 34mm tire in there. Or 31mm with fenders.
$5,000.00
The Caledonia-5 is the bike we keep reaching for when we know the odometer's going well past the triple-digit mark. Long rides invariably have some smooth tarmac, some junk pavement over backroads, a cutty singletrack connector, and maybe even your own local Strade Bianche sector. So we built a bike that could take on all of them, do it well, and fit fenders in case the ominous clouds turn into a downpour 130km into your day.
$4,300.00
The Caledonia-5 was inspired by our own out-the-front-door rides and built for the way we ride bikes. You could call it an "all road" or "endurance" bike, but when it comes right down to it, the Caledonia is the bike we keep reaching for when we know the odometer’s going well past the triple-digit mark. Long rides invariably have some smooth tarmac, some junk pavement over backroads, a cutty singletrack connector, and maybe even your own local Strade Bianche sector. So we built a bike that could take on all of them, do it well, and fit fenders in case the ominous clouds turn into a downpour 130km into your day. We don’t see road bikes as fragile machines meant only for putting watts into and receiving speed from. They’re an extension of our soul, of the way we want to see our worlds, and the lives we want to live. Sometimes that means cutting across park grass, and sometimes it’s seeing where that dirt road off to the left leads you. The Caledonia-5 is a bike for the modern road rider. Aero Cable Management The Cervelo frame, fork, handlebars, and associated components are designed to hide brake and shift control lines (mechanical, electrical, and hydraulic) from the wind for improved aerodynamics, without sacrificing usability or performance. Performance Fit The Caledonia’s integrated stem and two bearing cap options allow for stacks ranging between an aggressive 7mm and a relaxed 22mm without the use of spacers. With a wider fit coordinate range (stack) of 580mm to 687mm, the Caledonia can be as low as a slammed R3 or taller than our tallest C3. All while looking and being seamlessly fast in the wind. Integrated Accessory Mounts Integrated mounts enable the use of fenders, lights, and computers without compromising the aerodynamics or structure of your bike. The built-in mount systems provide a simple and clean-looking solution in a lighter weight frame.
$2,700.00
SIMPLY FASTER The P-Series is for the athlete seeking speed, storage, value, and comfort. It's our no-nonsense machine engineered to get you from A to B as fast as possible. It's a no-excuses machine and your perfect PR sidekick. It's lighter and more aero than its predecessor, the P3, making it faster on all courses. Naturally, aerodynamics and weight are only part of the equation-the P-series comes with a 500mL aero bottle, 400mL of top tube storage, and an integrated rear hydration mount. Customize the cockpit and the storage to your needs and your race. Collapsing the assumption that narrow is aero, the new P-Series leverages all that we learned during the legendary P5 development to deliver a platform that is not only stiffer and lighter than its predecessor but also boasts lower drag. It climbs better, corners naturally, and is faster in every application.
$2,500.00
We created the race-ready P-Series for the athlete seeking speed, storage, value, and comfort. It’s our no-nonsense machine engineered to get you from Point A to B, faster. The P-Series features better air economy, improved stiffness and comfort, and a design that incorporates discipline, focus, style, and swagger—every pedal stroke propels human and machine through the air with ease, turning watts into wins. Whether your challenge is a long course or Sprint event, P-Series comes equipped to carry the load. With a 500ml aero water bottle, 400ml of top-tube storage, and an integrated rear hydration mount as standard equipment, no opportunity to help our athletes win races is ignored. Collapsing the assumption that narrow is aero, the new P-Series leverages all that we learned during the legendary P5 development to deliver a platform that is not only stiffer and lighter than its predecessor but also boasts lower drag. It climbs better, corners naturally, and is faster in every application.
$5,500.00
The P5 Disc is a bike focused entirely on one thing: your performance. We applied years of experience in engineering the fastest aero bikes and real-world testing with our pro athletes. The result is a bike that pushes the boundaries in every way. Weight Our engineers dedicated countless hours to testing and data crunching to make the P5 not only stiffer and more aero, but lighter as well. A lighter bike accelerates faster and climbs better to give you every possible advantage on the road. Aerodynamics The legendary aerodynamics of the P5 are fine-tuned to create an aero system that is stiffer and lighter than ever before. Its frame shapes, fit adjustments, and design features work together to reduce drag and enhance your efficiency. Stiffness We refined the stiffness of key points of the frame to create a bike that corners better and transfers power more smoothly. You will feel it from your first pedal stroke: a stiff response that inspires you to pedal harder and go faster.
$5,500.00
Triathletes are the kings and queens of ritual, hyper-focus, and discipline. We revel in the complexity and details—not in one sport, but in three. It’s the same attention to detail that fuels the development of Cervelo’s PX-Series. Born from advanced aero testing, this machine features an innovative silhouette with improved aerodynamics, stiffness, and cockpit construction, while providing the rider efficient fueling and travel-ability solutions. We’re asking the tough questions and challenging the status quo—all to create a bike that reflects the ambitions of the competitor. We broke ALL THE RULES in search of speed…even the UCI’s. Forged by the unique and demanding requirements of today’s triathlon competitor, the PX-Series is lighter and stiffer than the P5X, it features unparalleled comfort and fit options with integrated fuel storage systems for longer events, and its innovative frame design makes travel a breeze. Experience-driven storage solutions are integrated and modular to fit every need of the long-course athlete, without sacrifices to performance. Training or Race-day, whether you fill them to capacity or ignore them all together, there is zero penalty to speed! Applying cutting-edge layup techniques and design principles, the PX is stiff and light to climb faster and handle better. These noticeable efficiency gains deliver a lively, responsive ride unprecedented in the SuperBike world. Put simply, it just feels fast.
$2,000.00
Challenge and glory come in many forms: conquering a hard climb, flying down a switchbacking descent, or simply pedaling in the fresh air. Whatever form it takes for you, the R2 will be a willing companion, offering high performance and excellent value. Engineering Confidence The R2 reaps the benefits of Cervelo's extensive knowledge in building stiff bikes. Careful attention is paid to stiffness at the bottom bracket and head tube to create a climbing and descending virtuoso. You'll feel its rapid acceleration and confidence-boosting handling. Balanced Performance Our engineers tried dozens of different designs and conducted hours of testing in creating the R2. The sum of this effort is a light and stiff bike that revels on steep climbs and descents and offers aero advantages when you're in the pace line. Built For You The R2 is upgradable to any shifting system currently on the market. You can run tires up to 28mm wide for a smoother ride. And, the chain catcher will ensure you won't drop your chain at an inopportune time — like when your friend launches a surprise attack up the hill.
$3,000.00
The R3 is a high performance allrounder, ready for everything from the Tuesday night world champs to an epic weekend ride. Light, stiff, and designed for confidence-boosting handling, this is a bike that you can trust. Using special carbon layup and construction techniques, Cervelo reduced the frame's weight while making it stiffer at key points. The result of this impressive stiffness-to-weight ratio is a lively and confidence-inspiring bike. Stiff and lightweight, with geometry that promotes stable and predictable handling, the R3 urges you to attack on the climb and push the pace on the descent. The R3 features a robust chain stay protector, future-proof cable management system (compatible across all types of shifting systems), and a reduced friction bottom bracket guide. Clearance for tires up to 28mm wide and frame compliance create a smoother ride. Features - Squoval Max tubes combine the attributes of a square with an oval, but with a more aerodynamic leading edge - BBright bottom bracket allows the use of larger-sized tubes in the seat tube, down tube, and lefthand chain stay - Elite Fit offers a wide range of positions for all athletes without compromising handling, comfort, or performance
$3,500.00 - $4,200.00
The R5 will fuel your passion, whether you find glory in winning races or beating your friends to the top of the hill. The R5 makes no compromises as a race machine first and foremost: like you, it thrives on punishment. Cervelo made the R5 stiffer at key points in the bike while maintaining its featherweight status. The R5's careful balancing of stiffness and weight results in a bike that accelerates quickly but is stable and predictable at speed. Ideal for stage races and hill climbs, the R5 Rim is a high performance bike you can trust. Stiffness and geometry work together for pedaling efficiency and stable handling, while wider tires and frame compliance create a smoother ride which reduces rider fatigue. Disc brakes ensure controlled braking in all conditions. It's clear Cervelo values user-friendly and intuitive adjustments. The thoughtful details of the R5 will delight you: RAT thru axles for fast wheel changes, plenty of tire clearance (for tires up to 28mm wide), and an integrated computer mount for uncluttered handlebars. Features: - Squoval Max tubes combine the attributes of a square with an oval for the ideal balance of stiffness and weight, while reducing aerodynamic drag - Pro Fit has a lower front end for better aero performance. - BBRight bottom bracket allows for larger-sized tubes in seat tube, down tube, and lefthand chainstay for increased stiffness and pedaling efficiency in a lighter weight frame - Improved stiffness and aerodynamics over previous generation R5
$2,950.00
The R5 will fuel your passion, whether you find glory in winning races or beating your friends to the top of the hill. The R5 makes no compromises as a race machine first and foremost: like you, it thrives on punishment. Confidence Is Everything A high performance bike you can trust. Stiffness and geometry work together for pedaling efficiency and stable handling. Wider tires and frame compliance create a smoother ride to help reduce your fatigue. Disc brakes ensure controlled braking in all conditions. Detailed Perfection Cervelo values user-friendly and intuitive adjustments. The thoughtful details of the R5 will delight you: RAT thru axles for fast wheel changes, plenty of tire clearance (for tires up to 30mm measured width), and an integrated computer mount for uncluttered handlebars. Optimal Balance We made the R5 stiffer at key points in the bike while maintaining its featherweight status. In fact, the disc model of the R5 is our stiffest road frame ever. The R5's careful balance of stiffness and weight results in a bike that accelerates quickly but is stable and predictable at speed.
$4,000.00
The S-Series makes every part of your ride better: the final sprint on your Saturday morning group ride, the long climb, and the solo effort on the edge of town. We've applied years of experience building the most aero bikes in the peloton to create a bike that delivers maximum performance. TRUSTED AERODYNAMICS The S-Series is designed to be an aerodynamic integrated system incorporating the rider, frame, and components. Frame tube shapes and design elements work together to manipulate and smooth the airflow over the bike and rider. The result: you go faster. OPTIMIZED PERFORMANCE Stiffness in critical parts of the frame is essential for calm and precise handling and pedaling efficiency. Most aerodynamic bikes have to trade off aerodynamics for stiffness, but we worked hard to ensure the S-Series frames are stiff, while maintaining aerodynamic performance. BUILT FOR YOU Cervélo builds bikes that are easy to own, so you can spend less time servicing them and more time enjoying the ride. The S-Series is spec'd with components that are easy to upgrade, and the bike is designed to be ready for electronic, mechanical, or hydraulic shifting.
$4,000.00
If you are always chasing your next fastest ride, the S3 aero road bike will give you every possible advantage. Cervelo made the S3 more aerodynamic and with an optimized balance of stiffness and compliance. The result is increased speed, power transfer, and comfort. Aerodynamics are critical to engineering a fast bike—aero drag accounts for as much as 90% of the overall resistance affecting a rider. After hours spent testing in the wind tunnel and refining designs, Cervelo produced a bike that is ideal for sprints, criteriums, and solo breakaways. Using special frame tube shapes and design features such as full internal cable routing integrated with the cockpit, they improved aerodynamics so you can reap the benefits of reduced drag. You'll enjoy a smooth ride on the new S3. Specific frame lay-ups and tube shapes soak up road vibrations, helping to reduce your fatigue during long days. Combined with optimized stiffness and stable geometry, this is a bike that'll make you feel good and go fast. Increased stiffness at the bottom bracket enables efficient power transfer, so your hard work is transferred to rapid acceleration. Stiffness at the head tube is critical to confidence-inspiring handling—you'll feel how stable and precise the S3 is when cornering and descending at speed. Features: - TrueAero combines specific tube shapes, sizes, and design features to improve aerodynamic flow across the bike. - BBright utilizes larger-sized tubes at the seat tube, down tube, and lefthand chainstay, resulting in increased stiffness and pedaling efficiency in a lighter weight frame. - Aero cable management with integrated frame, fork, and handlebars designed to hide brake and shifter cables from the wind for aerodynamic improvements, without sacrificing usability or performance.
$5,500.00
The S5 is an aerodynamic road bike built for the fastest sprinters in the world. It is stiffer and more aerodynamic than ever before while offering excellent comfort and ride quality. If you live for the exhilaration of going fast, the S5 will give you every possible advantage. Integrated Aerodynamics The S5 boasts substantial aerodynamic improvements over its predecessor. Full internal cable routing, a custom bar and stem, tuned riding position, and special frame shapes work together to reduce drag and improve aerodynamics. The result: you go faster. Maximize Your Power The best sprinters in the world need a bike stiff enough to handle the extreme forces they produce in the frantic sprint to the line. The new S5 Disc is significantly stiffer at the bottom bracket and head tube, without increasing frame weight. Confidence and Comfort You'll feel the difference immediately. Frame stiffness and geometry work together for precise handling and pedaling efficiency. Frame lay-ups and tube shapes, along with tires up to 28mm wide, soak up road vibrations for a smoother ride.
$5,500.00
The S5 is an aerodynamic road bike built for the fastest sprinters in the world. It is stiffer and more aerodynamic than ever before while offering excellent comfort and ride quality. If you live for the exhilaration of going fast, the S5 will give you every possible advantage. Integrated Aerodynamics The S5 boasts substantial aerodynamic improvements over its predecessor. Full internal cable routing, a custom bar and stem, tuned riding position, and special frame shapes work together to reduce drag and improve aerodynamics. The result: you go faster. Maximize Your Power The best sprinters in the world need a bike stiff enough to handle the extreme forces they produce in the frantic sprint to the line. The new S5 Disc is significantly stiffer at the bottom bracket and head tube, without increasing frame weight. Confidence and Comfort You'll feel the difference immediately. Frame stiffness and geometry work together for precise handling and pedaling efficiency. Frame lay-ups and tube shapes, along with tires up to 28mm wide, soak up road vibrations for a smoother ride.
$4,500.00
A frameset built to excel in the fiery intensity of track racing. For the T4, we applied everything we have learned from our category-leading time trial bikes and optimized it for the special demands of track racing. This is a frameset that lives for the extremes. Your Advantage You want every possible advantage in a track cycling race: every microsecond counts. The T4 is one of the most aerodynamic frames that we make. Specific frame tube shapes, rider position, and design elements combine to create an optimal aerodynamic system. Extreme Stiffness The T4 frameset is designed to handle the raw power of the world's fastest riders. We reinforced the stiffness of the bottom bracket so that every watt of your pedaling input is directly transferred to forward momentum.