Tires/Tubes

From light winter trail riding to commuting, the Kahva allows you to carve your way through winter with concave carbide studs as well as single, double, and triple-siped lugs. - Siping on center and side lugs lets the Kahva conform to terrain for increased grip in any riding conditions - Concave carbide studs provide traction in the iciest conditions - 252 carbide aluminum studs - Directional lugs provide low rolling resistance while offering excellent braking traction - We design 45NRTH tires for extreme winter cycling applications. We do not recommend this product be used with power assist bikes as the additional torque and system weight can lead to pre-mature casing wear and stud loss.

OFF-ROAD The Kessel is our aggressive trail, all-mountain, and enduro tire. Tall, angular lugs, an open tread pattern, and dual-compound rubber work together for exceptional grip on loose, technical terrain. Ramped center lugs keeps rolling resistance low, while our Durable and Ultra-Durable casings with sidewall and puncture protection keep you rolling. Kessel delivers predictable performance as you push your limits. HOW IT WORKS - Center lugs are tall, angular, and ramped in the front to keep rolling resistance low; a flat side on the back boosts braking traction. Siping conforms to the terrain for maximum traction, and wide spacing improves grip while shedding mud and debris. - Alternating side lugs are angled to add traction in every direction; wide, parallel siping digs into loose trail surfaces while cornering.

Puncture protection and mileage are the strengths of Hardshell-ProTection. A wider PolyX Breaker, the specialist against punctures under the tread center and shoulders, provides for great reliability. The three-ply—each layer with 60 TPI—carcass covers the entire tire and makes it a real bastion against urban detritus. The outer sidewalls of the tire are reinforced with DuraSkin fabric, providing even more reliability due to the casing being so well protected. Hardshell tires are the puncture-resistant flagship amongst racing tires—produced exclusively in Germany. - Ideal when it comes to extremely long service life, for the next tour or the commute. - Made for rough surfaces and rugged tarmac.

Versatile and confidence inspiring, the Gravdal securely navigates through harsh winter conditions with concave carbide studs for added traction in icy conditions. - Siping creates a more conforming lug for added traction - Concave carbide studs provide traction in the iciest conditions - Reflective strip on sidewall makes you more visible when riding in low-light conditions - Fits most bikes with cantilever or disc brakes

Continental's ultra-tough Gator Hardshell combines 3 flat-protection technologies into the ultimate distance and training tire. It features a flat-busting, bead-to-bead layer of DuraSkin and an extra-wide Poly-X Breaker anti-puncture strip. But Conti wasn't done yet. They added material in the tread to improve mileage and lend another level of puncture resistance. Plus, the folding bead keeps the weight low. Weight: 23c: 250 grams 25c: 270 grams 28c: 350 grams 32c: 385 grams

- Bead to bead tread - Urban assault tire

Tough enough for the meanest streets - Durable enough for urban assault, park riding, commuting, cargo bikes, etc. - Grooved slick tread design - Wrap-around tread pattern As the original urban assault tire, we designed the Hookworm to take the abuses of the most aggressive street riders. Bead-to-bead tread provides durability and traction whether you're dropping staircases, grinding rails, or riding in your local skate park.

Tough enough for the meanest streets - Durable enough for urban assault, park riding, commuting, cargo bikes, etc. - Grooved slick tread design - Wrap-around tread pattern As the original urban assault tire, we designed the Hookworm to take the abuses of the most aggressive street riders. Bead-to-bead tread provides durability and traction whether you're dropping staircases, grinding rails, or riding in your local skate park.

Tough enough for the meanest streets - Durable enough for urban assault, park riding, commuting, cargo bikes, etc. - Grooved slick tread design - Wrap-around tread pattern As the original urban assault tire, we designed the Hookworm to take the abuses of the most aggressive street riders. Bead-to-bead tread provides durability and traction whether you're dropping staircases, grinding rails, or riding in your local skate park.

OFF-ROAD Honcho is a high-performance tire designed for trail bikes. The tread pattern features tall, aggressive, and angular lugs that provides ample traction on loose and uneven terrain. It’s perfect for riders who tackle rocky, rooty trails. HOW IT WORKS - Center lugs closely and evenly spaced for a fast-rolling feel; enclosed siping improves traction while accelerating and braking. - Transition lugs are tall and spaced out to shed mud; horseshoe siping conforms to the trail and maintains braking traction. - Side lugs are staggered with parallel siping for grip while leaning through corners, and a braking shovel shape boosts traction when stopping.

It’s all in the name, ThickSlick. Made with a burly casing designed to withstand the roughest urban conditions, while the no-nonsense, slick design provides the bite you need in the concrete jungle. Need more rubber? The nearly indestructible Flat Guard level, with its Urban Armor Casing and added rubber everywhere, provides optimal protection to contend with any city streets. It's no one wonder why this tire has a cult following among couriers, those not wanting to deal with flats, and value-conscious consumers. ThickSlick Benefits: - Puncture Protection: The thicker a tire, the harder it is for glass, pins, staples, and other urban unpleasantries to worm their way in. - 2x the Rubber: Twice the rubber tread equates to twice the lifespan of a tire. This means your price is 50% off the competition. - Smoother Ride Quality: Twice the rubber makes for a smoother ride through the natural absorption qualities of rubber. - Usage: Urban, Recreation, Utility - Conditions: Road

It’s all in the name, ThickSlick. Made with a burly casing designed to withstand the roughest urban conditions, while the no-nonsense, slick design provides the bite you need in the concrete jungle. Need more rubber? The nearly indestructible Flat Guard level, with its Urban Armor Casing and added rubber everywhere, provides optimal protection to contend with any city streets. It's no one wonder why this tire has a cult following among couriers, those not wanting to deal with flats, and value-conscious consumers. ThickSlick Benefits: - Puncture Protection: The thicker a tire, the harder it is for glass, pins, staples, and other urban unpleasantries to worm their way in. - 2x the Rubber: Twice the rubber tread equates to twice the lifespan of a tire. This means your price is 50% off the competition. - Smoother Ride Quality: Twice the rubber makes for a smoother ride through the natural absorption qualities of rubber. - Usage: Urban, Recreation, Utility - Conditions: Road

It’s all in the name, ThickSlick. Made with a burly casing designed to withstand the roughest urban conditions, while the no-nonsense, slick design provides the bite you need in the concrete jungle. Need more rubber? The nearly indestructible Flat Guard level, with its Urban Armor Casing and added rubber everywhere, provides optimal protection to contend with any city streets. It's no one wonder why this tire has a cult following among couriers, those not wanting to deal with flats, and value-conscious consumers. ThickSlick Benefits: - Puncture Protection: The thicker a tire, the harder it is for glass, pins, staples, and other urban unpleasantries to worm their way in. - 2x the Rubber: Twice the rubber tread equates to twice the lifespan of a tire. This means your price is 50% off the competition. - Smoother Ride Quality: Twice the rubber makes for a smoother ride through the natural absorption qualities of rubber. - Usage: Urban, Recreation, Utility - Conditions: Road

Schwalbe's Marathon is the archetypal touring tire. Their highly elastic, 3mm India rubber GreenGuard layer almost eliminates flats over the course of the tire's excellent, long life. Whether you're setting out on a cross-country bike tour, cruising on a tandem, or just want peace of mind during your daily commute, the Marathon Supreme is in it for the long haul.

OFF-ROAD Ehline is an ideal tire for modern XC trails: fast-rolling without compromising cornering performance. Ehline’s tread pattern and casing provide more traction and durability than traditional XC tires, making it a great choice for riders who take on increasingly aggressive and challenging terrain. HOW IT WORKS - Center lugs are short, tightly-spaced, and ramped to roll quickly; perpendicular siping provides grip during both braking and acceleration. - Transition lugs are ramped to roll quickly and spaced out to shed mud; horseshoe-shaped siping allows lugs to conform to the terrain to maintain traction during braking. - Side lugs are taller and staggered, with parallel siping to enhance grip while leaning into a turn.

Let Dunderbeist loose on your local groomed single track and feel the aggressive tread claw through the snow with unrivaled propulsion and braking traction. Its 4.6-inch footprint provides enhanced flotation and is compatible with a wide range of frames. Dual compound rubber rolls fast and keeps you in control while shredding the berms. Point uphill and feel the Dunderbeist dig in as you attack climbs covered in loose, unconsolidated snow. Pair Dunderbeist with its sibling front tire, Flowbeist, for the ultimate combination of traction and control. - 4.6” footprint - Designed for optimal use as a rear tire - Aggressive side lugs comprised of soft rubber compound - Ideally paired with Flowbeist front tire

This new version of the proven, fast-rolling Randonneur tire features new 1c compound construction and a reflective sidewall stripe. - Hard-working, hard-wearing tire built for racking up big mileage - The ideal tire for city riding and touring, even in semi-wet conditions - ECE-R75 (European Certification e-bikes)

Refined, redesigned, and ready to shred any line - Ramped and siped tread to roll fast and track straight under braking - Wide trail (WT) casing specs are optimized for 30-35mm inner width rims With side knobs borrowed from the legendary Minion DHF but widened to provide more support, the DHR II corners like no other. The center tread features ramped leading edges to improve acceleration and sipes to create a smooth transition when leaning the bike. Paddle-like knobs on the center tread dig in under hard braking and help keep the bike under control. Pair it with a Minion DHF up front for the ultimate aggressive trail riding tire combo!

Among our most versatile drop bar tires, the Venture delivers optimal performance across the widest range of conditions to serve as a truly set-it-and-forget-it gravel tire for riders who demand traction across a wide variety of terrain. Elevated centerline ridges provide consistent working edges that dig in whether hammering up a climb or leaning into a turn. Two rows of outer knobs provide confidence regardless of how hard you’re cornering while also providing substantial sidewall protection. Venture is the tire of choice when the destination is unknown but you’re sure to encounter a variety of terrain along the way. - The large, high-volume footprint of each Venture tire allows for more working edges of the tread to always be in contact with the terrain. - Rounded profile with vertical channels to enhance cornering characteristics. - High-volume casing enables comfortable ride. - Dual Compound Rubber means a fast-rolling tire with great cornering traction.

Telegraph is a high-volume performance road tire. It offers all the grip and rolling speed of lower-volume road tires, with the comfortable ride of a larger 120 tpi casing. Telegraph’s tread pattern features a slick center tread for carrying speed and a textured transition area for cornering grip. Telegraph is made for anyone who wants to elevate the road riding experience. - Designed and inspired by our experiences riding and racing on pavement - Grippy single-compound rubber - 120 tpi casing - Slick center tread minimizes rolling resistance - Textured transition area - Tubeless ready for flat prevention, lower-pressure traction, and comfort - Internal liner improves tubeless performance and durability - Always check with your rim manufacturer to verify rim and tire compatibility before assembly or use

All around touring or commuting tire with ProTite protection, Panaracer's best-ever puncture prevention technology. Its comprehensive size range insures that you can find a Pasela for most any usage. Ride it and trust it. - Urban/Commuter tire

This new version of the proven, fast-rolling Randonneur tire features new 1c compound construction and a reflective sidewall stripe. - Hard-working, hard-wearing tire built for racking up big mileage - The ideal tire for city riding and touring, even in semi-wet conditions - ECE-R75 (European Certification e-bikes)

- Versatile tread pattern suitable for a broad range of conditions - Medium-height center knobs are ramped to reduce rolling resistance and are staggered to provide a consistent feel across the profile of the tire - Side knobs are fairly aggressive and provide excellent cornering grip - Available with a wire bead or folding bead with EPS puncture protection

You need a tire that keeps your legs on their game for hours on end, provides tenacious grip in the corners, allows you to drop your buddies off the start, while remaining composed when leaned over through the first turn. Luckily, WTB has made the ultimate tire for you. Aggressive cornering knobs meet a fast centerline, making for a tire that carries speed into the turns yet corners like it means it. Roadesque enough in appearance, the Riddler 37c is just as ready for the local cross course as it is spinning down an empty gravel B-road. The 45c corners with confidence on hard surfaces while still sinking its teeth deep into your favorite trails. Incredibly versatile in a what-can't-it-do type of size, this tire breathes capability when mounted to any drop bar bike. Usage: Cyclocross / Gravel Exploration / Dirt Touring Conditions: Dry to Damp / Hardpack to Sand - 700x 37c: 465g, Dual DNA compound - 700 x 45c: 560g, Dual DNA compound

- Versatile tread pattern suitable for a broad range of conditions - Medium-height center knobs are ramped to reduce rolling resistance and are staggered to provide a consistent feel across the profile of the tire - Side knobs are fairly aggressive and provide excellent cornering grip - Available with a wire bead or folding bead with EPS puncture protection

- Excellent urban or touring tire - 400D Lite Extra casing cord for a supple and responsive ride - ProTite now provides 25% more puncture resistance over older PT technology - Amber Sidewalls

Dirt-to-pavement versatility - BMX, urban assault, or dirt jump - Inverted knob design The Holy Roller is one of those "set-it-and-forget-it" tires. Mount up a pair of Holy Rollers on your BMX or DJ bike and you'll be ready for the next session no matter where it's happening—dirt, street, or park.

Refined, redesigned, and ready to shred any line - Ramped and siped tread to roll fast and track straight under braking - Wide trail (WT) casing specs are optimized for 30-35mm inner width rims - DH casing features 2 ply 60 TPI construction with a butyl reinforced sidewall for maximum durability With side knobs borrowed from the legendary Minion DHF but widened to provide more support, the DHR II corners like no other. The center tread features ramped leading edges to improve acceleration and sipes to create a smooth transition when leaning the bike. Paddle-like knobs on the center tread dig in under hard braking and help keep the bike under control. Pair it with a Minion DHF up front for the ultimate aggressive trail riding tire combo!

From hardpack groomed trails to soft backcountry pursuits, Hüsker Dü’s 4.8 inch wide casing offers a huge footprint while maintaining rolling efficiency for the best balance of speed and float. Built around the perfect balance of low rolling resistance, traction and flotation, shorter center treads roll faster, and slightly taller shoulder knobs give more bite when cornering. An overall reduced lug count, combined with a tubeless-ready bead make the 4.8” Hüsker Dü a great option for any winter fat bike adventure. - 4.8” casing offers the most float of any 45NRTH tire - Ideal for loose conditions at low pressure - Reduced lug count for rolling efficiency on harder packed trails - Tall shoulder lugs increase cornering traction

ALL-ROAD From minimum maintenance to decaying pavement, rolling hills to near vertical climbs, Rampart was made for riders who want the freedom to pick their own path no matter what the road looks like. These tires were designed and inspired by our experiences riding and racing courses with varying conditions. HOW IT WORKS - Center tread is smooth and fast-rolling for straight-line speed; thicker center tread and durable casing lasts longer even on harsh surfaces. - Transition and side lugs consist of 3-2-1 siping for traction on all road surfaces.

GRAVEL Whether your route covers rough roads or fast gravel, or even both in the same day, Washburn is built for the job. Its center slick provides awesome rolling efficiency on pavement and packed dirt, while the shoulder lugs take over in the turns, digging in for confidence in loose corners. HOW IT WORKS - Center tread is smooth to minimize rolling resistance and maximize speed. - Transition lugs are tightly spaced to provide progressive initial cornering traction. - Side lugs are spaced out to dig in while cornering and when riding over loose surfaces.

45NRTH utilizes a two-piece construction method to create a reliable and high-performing bicycle tire stud with a concave carbide-aluminum design. The open space and edges created by the large concave crown result in twice the surface area for increased traction and grip. - Concave tip for traction, durability, and longevity - Aluminum base to save weight - Compatible with 45NRTH stud insertion tool - Compatible with all studdable 45NRTH tires - We design 45NRTH tires for extreme winter cycling applications. We do not recommend this product be used with power assist bikes as the additional torque and system weight can lead to pre-mature casing wear and stud loss.

The RiBMo is the essence of what a good urban tire is. A perfect blend of weight to strength and riding comfort with a proprietary ProTite Tech puncture material. - Urban/Commuter tire - 60-95 PSI

- High-quality, ultra-low weight tube that retains air just as well as conventional butyl tubes - Possesses the same resistance to punctures - 40mm valve length

Tannus Armour Tubeless inserts are the result of years of top level multi-cell foam manufacturing mixed with extensive professional riding experience. At the heart of Tannus is the patented Aither Technology; a multi-cell foam compound that forms the structure of the Armour. The inserts are designed to displace small impacts while offering a spring-like rebound for a smooth yet playful ride. - 3% Faster than standard tubeless - Flexible sidewall stabilizing "Wings" for smoother ride quality, with 50% more vibration damping - 20mm of rim protection - Not a sealant sponge – keeps sealant where it belongs - Easy Installation (5 Minutes, No tools required) - 150g - About as much as a standard tube (a little lighter)

Tannus Armour Tubeless inserts are the result of years of top level multi-cell foam manufacturing mixed with extensive professional riding experience. At the heart of Tannus is the patented Aither Technology; a multi-cell foam compound that forms the structure of the Armour. The inserts are designed to displace small impacts while offering a spring-like rebound for a smooth yet playful ride. - 3% Faster than standard tubeless - Flexible sidewall stabilizing "Wings" for smoother ride quality, with 50% more vibration damping - 20mm of rim protection - Not a sealant sponge – keeps sealant where it belongs - Easy Installation (5 Minutes, No tools required) - 150g - About as much as a standard tube (a little lighter)

The Muc-Off Tubeless Rim tape is made from their proprietary performance material with a pressure-sensitive adhesive to provide just the right amount stretch whilst maintaining durability and strength needed to create a lasting airtight seal. Semi-transparent material makes locating the valve hole easy.

- ISO Diameter: 406 / 20" BMX - Tube Compound: Butyl - Wall Thickness: 0.9mm - Valve: Presta - Valve Shaft: Threaded - Valve Core: Removable

Cruise in style with Schwalbe's Fat Frank. Their wide, round Balloonbike profile provides natural cushy suspension, and it rolls easily thanks to the smooth tread. It's also available in three colors to add panache to your cruiser. Weights: - 890 grams (29 x 2.0) - 975 grams (26 x 2.35)

- Permanently seals tube punctures up to 1/8 inch - Non toxic formula installs easily through Schrader valves - Complete with valve core remover and filler tube - Slime keg fills 160 tires at 1/2 the price per ounce of the 16 oz size

OFF-ROAD The Warwick is our progressive trail tire that’s versatile enough to handle stout XC terrain or enduro courses. Stepped center lugs and firm rubber reduce rolling resistance so you can carry speed. In corners and loose terrain, the large-multi-faceted lugs, open transition area, and softer rubber bite into the trail surface so you can throw yourself into turns with gusto. Two tire compound options (Fast and Grip) let you tailor your tire choice for the way you ride. Warwick balances control and speed for a fast, fun ride experience on many trail types. HOW IT WORKS - Center lugs are angular and have stepped front faces for rolling efficiency; a flat face on the back of the center lugs boosts braking traction. - The open transition area makes space for the shoulder and center lugs to dig into loose trails or grapple onto roots and rocks when climbing, and helps reduce rolling resistance. - Side lugs are large and multi-faceted for consistent, supportive cornering on rocky, rooty, and loose trails.

This race-day-specific weapon has raised the bar on tire technology. The Corsa Speed uses a proprietary Graphene compound, which is then paired with an ultra-fine Corespun-T casing. The end result is a tire that maintains the lowest rolling resistance, while still providing the trademark Corsa suppleness and outstanding wet weather grip - 320 TPI Corespun cotton casing - Proprietary Graphene compound - Lightweight, flexible latex inner tube

MICHELIN's StarGrip tires have a fascinating history. MICHELIN engineers were charged with designing shoes that could “adhere even to a stainless steel plate with an oily surface.” The tire guys saw the shoe's tread and this tire was born. The tread features star-shaped ridges extending in all directions, and like the shoes, it cuts through water, snow and mud for an outstanding grip. The tire's compound is similar to those used for winter car tires, so it remains flexible in the cold to provide unrivaled traction on wet, slippery roads and trails. In addition, there's a high-density nylon layer beneath the tread for excellent puncture resistance. So regardless of the weather, you'll have tires that can handle the ride.

Our most dirt-focused Road Plus tire yet, the Byway Road Plus TCS tire delivers supple plus-size traction and smooth riding characteristics farther into the dirt. The Byway Road Plus tire allows riders to find comfort on remote gravel roads without feeling slow on the pavement required to reach them. - Smooth centerline for efficiency with diamond-shaped outer knobs for grip in the dirt - High volume tire enables comfortable ride - Dual Compound rubber means a fast-rolling tire with great corning traction - Designed to meet ETRTO standards, TCS (Tubeless Compatible System) tires feature the best of both worlds: they boast the ride benefits & reliability of a tubeless tire with the minimal weight of a tube-type tire

All-around trials performance. Front- or rear-specific - Front 20x2.0 tire is built on 54-406 casing (20") - Rear 20x2.5 tire is built on 67-387 casing (19") and does NOT fit a standard 20" BMX wheel - Block tread design - Front- and rear-specific modified trials tire (Front = 20 x 2.0, Rear = 20 x 2.50) The first offering in the trials arena from Maxxis with specifications to meet the needs of the most demanding rider. The Creepy Crawler front-specific trials tire offers a supple ride with excellent traction that gives you the confidence to make the leap. The Maxxis Creepy Crawler is the best trials tire available on the market.

Make your mark on the gravel scene with the Gravel Grinder. This tire combines a fast-rolling diamond center with aggressive shoulder knobs that only hook-up when the terrain gets soft, muddy, or a bit sketchy. This TLR clincher with 120TPI nylon casing provides both performance, durability, and puncture protection when combined with the appropriate tubeless sealant.. TLR - TLR tires versions can be ridden tubeless with the addition of sealant but can also be run with an inner tube. - A bead-to-bead inner coating gives added puncture protection to these tubeless ready tires and greatly reduces gradual loss of air pressure. An aramid bead protection strip increases tire longevity and reduces rim chafing.

Continental Light Tubes are made of a lightweight seamless butyl rubber and are individually tested for top quality. These tubes are nearly 30% lighter than standard tubes to make your bicycle easier to ride. - 42mm valve: 70 grams - 60mm valve: 80 grams - 80mm valve: 90 grams

- Valve: Presta - Butyl rubber - Wall thickness: 0.9mm

The MICHELIN Protek Max provides excellent grip on wet and slippery surfaces thanks to its rubber compound and progressive siping with more grooves on the shoulders. Protek Max tires feature MICHELIN's Protek tread design, with a uniform center pattern, that provides improved comfort and performance. A super-durable 5mm puncture protection layer helps to ward off punctures. - Smooth, siped tread rolls fast and grips the road well in wet conditions - 5mm puncture protection ply underneath tread - Reflective strip on sidewalls to provide added low light visibility - Long wearing tread compound Weights: 26 x 1.40 (750g) 26 x 1.85 (1235g)

- Polyurethane tube - Twice as strong as a regular butyl tube - Super lightweight - Very compact

The MICHELIN Protek Max provides excellent grip on wet and slippery surfaces thanks to its rubber compound and progressive siping with more grooves on the shoulders. Protek Max tires feature MICHELIN's Protek tread design, with a uniform center pattern, that provides improved comfort and performance. A super-durable 5mm puncture protection layer helps to ward off punctures. - Smooth, siped tread rolls fast and grips the road well in wet conditions - 5mm puncture protection ply underneath tread - Reflective strip on sidewalls to provide added low light visibility - Long wearing tread compound Weights: - 700 x 28c (725g) - 700 X 32c (740g) - 700 x 35c (850g) - 700 x 38c (950g)

Continental Cross Tubes are made of seamless butyl rubber and are individually tested for top quality. They're also heavier duty than standard tubes and perfect for the rough-and-tumble world that is cyclocross. - 48mm valve: 160 grams - 60mm valve: 165 grams

MICHELIN's Dynamic Sport offers an excellent ride, high mileage and even puncture protection at a nice price. With its grippy tread, tough nylon casing and supple sidewalls, you'll enjoy all your road rides even more.

Continental tubes are made of seamless butyl rubber and are individually tested for top quality.

Continental tubes are made of seamless butyl rubber and are individually tested for top quality.

Indoor-training has never been so technical! Featuring our special compound and tread pattern and our strongest casing, this tire is designed expressly to disperse heat and reduce noise generated by home trainers. Keep your race tires clean and safe for race day, and spend your indoor-training miles on the Zaffiro Pro Home Trainer.

Special compound and tread pattern and our strongest casing are designed expressly to disperse heat and reduce noise generated by home trainer use. - Ideal for rollers or turbo trainer - Also available for 26 inch MTB wheel size

- Basic replacement grade tire suited for urban riding as well as some off-road - 20 x 2.125

- ISO Diameter: 622 / road / 29" - Tube Compound: Butyl - Valve: Standard Schrader - Valve Core: Removable - Valve Length: Schrader - Valve Shaft: Smooth - Weight: 110g (23-25mm), 128g (28-32mm), 144g (35-43mm), 160g (40-45mm)

Continental tubes are made of seamless butyl rubber and are individually tested for top quality.