700c, 27-Inch & 650c

The Strada is Challenge's go to tire for long days on the road. This all-condition tire combines a round profile that takes the sting out of rough pavement with a construction that provides maximum control and low rolling resistance. This handmade clincher combines a supple, 300TPI SuperPoly casing with natural rubber tread for long distance comfort, confident cornering, and quick handing. This tire includes PPS Ganzo, a lightweight and supple Puncture Protection System placed between the tread and casing to increase resistance to punctures.

Completely renewed, sporting a dynamic tread pattern design. Matches with a race bike, as well as a classic city road bike. Available in a wide range of dimensions and colors. PureGrip Compound Based on activated silica compounds, this technology was originally intended as an performance level compound, but after intensive development at our Korbach Research and Development Department Facility, an advanced new compound with outstanding grip and cross-country properties was developed. This new rubber mix, given the self explanatory name "PureGrip", is ranked just behind our BlackChili Compound and is being used in our performance products both in the road and mountain bike sectors. Whilst providing great grip, it is also long lasting and highly durable – both characteristics of Continental tires, which are exclusively manufactured in the factory in Hefei (Asia). Suitable for E-Bikes For our E-Bike tyre we fall back on over 100 years' experience with moped and motorcycle tires. All of our city/trekking tires are rated to a standard speed of at least 25 km/h. Those tires marked e50 are also certified for S-Pedelecs. With their high quality structure, puncture protection is high and the rolling resistance is low offering protection from premature wear brought about by the additional driving force.

A fast-rolling center section, flexible shoulder lugs and fine sipes give Continental's Contact II tire great grip on varied terrain. It also boasts Continental's SafetySystem for exceptional puncture protection with little added weight.

Continental's Gatorskin combines 3 flat-protection technologies into one fast-riding, high-mileage racing and training tire. It features a super-fine 180 thread-per-inch casing, a bead-to-bead layer of DuraSkin, and is finished with a Kevlar-reinforced top layer. The result is a light tire that rolls and corners with the best of them while providing flat protection second to none. - Weight: 290/310/360/365/390 grams (23c/25c/28c/32c/27 x 1 1/4) - PolyX puncture protection - DuraSkin sidewall protection

Continental's Gatorskin Folding combines 3 flat-protection technologies into one fast-riding, high-mileage racing and training tire. It features a super-fine 180 thread-per-inch casing, a bead-to-bead layer of DuraSkin, and is finished with a Kevlar-reinforced top layer. The result is a tire with a lightweight folding bead that rolls and corners with the best of them while providing flat protection second to none. - DuraSkin sidewall protection - PolyX puncture protection - Weight: 220/240/320/325 grams (23c/25c/28c/32c)

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

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.

The Grand Prix 5000 is the best all-rounder in the field, brought to a whole new performance level. Ride faster, more comfortably, and with increased puncture protection. Its Active Comfort Technology absorbs vibrations and smooths your ride. Lazer Grip technology, designed to make you one with the road, features a lasered micro profile structure that expands over the tire’s shoulder and provides outstanding cornering. The Vectran Breaker is lighter, more flexible and protects more effectively against cuts than comparable nylon. With incredible tear resistance at a very low weight, it possesses exactly the right properties to be a premium puncture protection insert, while not adversely affecting rolling resistance. The Grand Prix 5000—made to make you better. With Continental's unique and legendary BlackChili tread compound, produced only in Germany, they have revolutionized the sport of cycling. This compound answers the eternal question of the best balance of grip and rolling resistance for cycling. Regular test wins confirm the measurable and noticeable advantages for cyclists, established in both the lab and on the road. The latest polymers, as well as specially developed carbon black particles and filler materials, guarantee ultimate performance.

The Grand Prix 5000 S Tubeless Ready allrounder tires are lighter, faster and supported with stronger sidewalls, compared to previous GP5000 versions. Designed to be compatible with hooked and hookless rims, this new standard in road tubeless ready technology will allow you to ride faster, more comfortable and with increased puncture protection. - Hookless rim compatible up to 73 PSI / 5 bars - The tubeless ready (TR) carcass construction is robust and impervious against damage and penetration from foreign objects. The result: versatile, low weight and an attractive design. In addition, tires made using this technology can also be used as Tubeless or with an inner tube - Vectran Breaker is a synthetically manufactured high-tech fiber with an enormous tear resistance at a very low weight: Exactly the right properties to process into a premium Continental bicycle tire as a puncture protection insert - Active Comfort Technology absorbs vibrations and smoothens your ride - Lazer Grip, to make you one with the road. The lazered micro profile structure expands over the tire’s shoulder and provides outstanding cornering - BlackChili Compound provides the best balance of grip and rolling resistance for cycling

Michelin's best road tire for competition and training with more rolling efficiency. Allowed by its casing and sculpture for a sporty ride. More robustness, thanks to its aramid top reinforcement and its 3x120 TPI casing in the flanks. More longevity with X-Race Compound designed to optimize the wear of the tread. - X-Race Compound is a new rubber compound that combines rolling resistance, grip and wear to improve tire longevity - Grip Design provides safety on cornering - Aramid Protek+ casing features extra puncture protection

Gravel and dirt road racing tire - Dual-Compound for longevity - Gravel-specific tread pattern - Tubeless Ready (TR) Maxxis' first gravel-specific tire, the Rambler, is designed with the volume you need for comfort and the tread you need for speed and control. Tightly packed center knobs are ramped for rolling efficiency on hardpack roads, and spaced-out side knobs provide predictable cornering in varied terrain.

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

Gravel road riding is all the rage at the moment. It's great for cyclists who want to leave sealed roads behind and enjoy the freedom of cycling on unpaved roads. Designed to suit diverse touring styles, the GravelKing uses a mixture of properties that also accommodate on-road cycling. Featuring ZSG Natural compound, anti-flat Casing, and Advanced Extra Alpha Cord. - Black multi-use gravel tread - Aramid (Kevlar) folding bead

- The SS and SS+ feature an all-new tread pattern consisting of a smoother, diamond pattern center with more aggressive side lugs. - This tread pattern allows the rider to keep speed going into corners and maintain control throughout any transition a gravel ride could present. - The GravelKing SS incorporates a supple 126 TPI casing with a nylon puncture resistant belt and Panaracer's proprietary ZSG (Zero Slip Grip) compound. - The SS+ uses the same build as the SS but adds a bead-to-bead layer of Panaracer's ProTite puncture material for even more protection against tread and sidewall cuts for those extra demanding courses or rides with sharp flint rock.

- Extra thick slick tread that resists punctures and gets great wear life, a favorite of fixie riders now available in a multitude of sizes - Twice the amount of tread rubber than standard slick road tires

The Schwalbe One family provides the right tire for the latest gravel bike trend. The smooth rolling G-One profile and Tubeless Easy technology make it a pleasure to ride over forest paths and rolling fields. - Tubeless-Easy with MicroSkin fabric for gravel riding - OneStar compound helps to achieve an extremely low rolling resistance

The Flat-less tire. Schwalbe's best selling model. The most puncture resistant pneumatic tire there is. In addition to the superior puncture protection it features many inner values: - Rolling resistance. The patented, 5 mm thick SmartGuard layer, when compared to all generic products, has a significant advantage in rolling resistance. - Recycling. Also in the SmartGuard, we use a proportion of recycled rubber from old latex products. - “Anti-aging” side wall. It now lasts much longer before deveolping unsightly cracks when subjected to use with too low air pressure. - E-Bike ready. Due to its great properties Marathon Plus is the best choice for E-Bikes (E-25). The main sizes are approved and tested for E-bikes up to 50 km/h.

Schwalbe's Marathon Plus is legendary for durability and protection. Their nearly impenetrable 5mm-thick SmartGuard 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.

- A trekking tire that can go anywhere you want it to take you - SmartGuard puncture protection layer offers the best puncture resistance of any tire - Endurance compound for super long tread life

The Schwalbe One family provides the right tire for the latest gravel bike trend. The smooth rolling G-One profile and Tubeless Easy technology make it a pleasure to ride over forest paths and rolling fields. - MicroSkin Casing

- The next generation of tubeless tires. A truly thrilling ride. It's fast. It's reliable. It's light. - The patented MicroSkin construction makes this all possible. The rolling resistance is minimal! - All around cut resistance and puncture protection are extraordinary. - This is the absolute top model from Schwalbe! - The Schwalbe One Pro can also be used with a normal tube, but its true strengths are experienced only in tubeless form.

The Nimbus Sport Reflect tire has a smooth tread that rolls fast and serves as the perfect fit for any rider looking to get around town. There are many widths to accommodate different bicycles, riding styles, and comfort levels, while the BlackBelt flat protection adds confidence for riding over rough city roads and bike paths. For an extra touch of protection, this model includes reflective accents that increase your visibility to motorists in low-light conditions. - Casing: 60 TPI - Bead: Wire - Compound: 70a - Flat Protection: BlackBelt - 700 x 28mm, PSI 115-125, approximate weight 565g - 700 x 32mm, PSI 75-100, approximate weight 625g - 700 x 35mm, PSI 75-100, approximate weight 685g - 700 x 38mm, PSI 75-100, approximate weight 715g

The RoadSport is a solid performer that's plenty reliable. It features a durable compound with low rolling resistance and plenty of grip, while our proven Flak Jacket puncture protection will give you peace of mind while out on the road. - Casing: 60 TPI - Bead: Wire - Compound: 70a - Flat Protection: Flak Jacket

With the Crossroads tire, we redesigned our popular tread, making it the best multi-terrain tire out there. Whether on your mountain bike or town bike, this tire is ready for the rigors of everyday street life. And with Flak Jacket flat protection, plus a rugged casing and smooth-rolling tread, you'll get around town easily without worrying about flats or traction on parkways and cobbles. - Casing: 60 TPI - Bead: Wire - Compound: 60a - Flat Protection: Flak Jacket - 700 x 38mm, PSI 50-80, approximate weight 575g

The Hemisphere is a modern, versatile, and durable trekking tire with tough Flak Jacket puncture protection and a bold tread that delivers control on loose surfaces. This tire's serial center blocks roll easily on paved surfaces, while also providing off-road traction through wide-spaced shoulder blocks that bite into soft ground. Altogether, the Hemisphere will excel on streets and bike paths alike. - Casing: 30 TPI - Bead: Wire - Compound: 70a - Flat Protection: Flak Jacket - 700 x 38mm, PSI 75-100, approximate weight 820g - 700 x 42c, psi 50-100

The updated Roadsport tire features one of our classic, most versatile tread patterns paired with the bead to bead protection of our premium Endurant casing. This upgrade gives the tire increased speed, grip and durability, all in a lighter weight package. We also updated the rubber with a new, extra-grippy compound that provides safe and predictable handling in a variety of conditions. So, it's no surprise that it has already become a Specialized employee favorite. - 27 x 1-1/4", psi 85-95, approximate weight 545g - Bead: Wire - Casing: 60 TPI - Compound: 60a - Flat Protection: Endurant

The Specialized Electrak Armadillo is an choice for high-power E Bikes, and other bikes that can handle this size. The Armadillo construction provides maximum flat protection while supporting the entire casing to handle the rigors that these bikes dish out when roaming city streets. The slightly rough, round profile allows for fast riding and ultimate grip, along with smooth transitioning into corners. Also a great choice to install on a 29-inch wheeled mountain bikes to zoom around town! - Weight: 640g

The Nimbus 2 Sport tire features an added puncture protection, an updated tread and compound that rolls even faster, and more grip than ever before. It comes in many widths to accommodate different bicycles, riding styles, and comfort levels, so it's the perfect choice for riding on any road or bike path. And with BlackBelt flat protection, you can have the peace of mind that you won't be plagued with flats. - Casing: 60 TPI - Bead: Wire - Compound: 60a - Flat Protection: BlackBelt - 700 x 32mm, psi 75-100 - 700 x 35mm, psi 50-80 - 700 x 38mm, psi 50-80 - 700 x 45mm, psi 35-65

The updated RoadSport tire features one of our classic, most versatile tread patterns paired with the bead-to-bead protection of our premium Endurant casing. This upgrade gives the tire increased speed, grip, and durability, all in a lighter-weight package. We also updated the rubber with a new, extra-grippy compound that provides safe and predictable handling in a variety of conditions. So, it's no surprise that it has already become a Specialized employee favorite. This model features a reflective strip on the sidewall for increased visibility in low-light conditions. - Casing: 60 TPI - Wire Bead - Compound: 60a - Flat Protection: Endurant - Max pressure 85 – 95psi - Approximate weight: 470g

On dry, fast, and hardpack cyclocross courses, choose Specialized's Trigger Sport Tire for extra speed. Its file-tread pattern features small, fast-rolling center lugs that progress to large, aggressive shoulder knobs for predictable transitions and sure-footed handling in the corners.