The Challenge Gravel Grinder is perfect for adventure and gravel riders who want more control than the Strada Bianca for rougher, looser gravel roads and trails.File tread pattern with exaggerated side tread for excellent speed and gripVulcanised Race casing gives an incredibly smooth and supple rideFolding bead casing with PPS puncture protectionRace rubber compound for excellent grip and durabilityNot tubeless compatibleThe Gravel Grinder's file centre tread gives it incredibly low rolling resistance, so you can speed along without giving too much away to the much slicker Strada Bianca. Compared to the Strada Bianca though, the Gravel Grinder's exaggerated side tread gives bundles of confidence in loose corners, so you can attack them.On rough gravel trails, you need confidence that your tyres are tough enough for the job and the Gravel Grinder won't let you down thanks to it's double PPS puncture protection, while the vulcanised Race casing gives it that elegantly supple ride that marks Challenge's handmade tyres out from the rest. If you want a highly versatile, lightweight and tough tyre for your gravel bike, the Challenge Gravel Grinder is up to the task.
The Challenge Gravel Grinder is perfect for adventure and gravel riders who want more control than the Strada Bianca for rougher, looser gravel roads and trails.File tread pattern with exaggerated side tread for excellent speed and gripVulcanised Race casing gives an incredibly smooth and supple rideFolding bead casing with PPS puncture protectionRace rubber compound for excellent grip and durabilityNot tubeless compatibleThe Gravel Grinder's file centre tread gives it incredibly low rolling resistance, so you can speed along without giving too much away to the much slicker Strada Bianca. Compared to the Strada Bianca though, the Gravel Grinder's exaggerated side tread gives bundles of confidence in loose corners, so you can attack them.On rough gravel trails, you need confidence that your tyres are tough enough for the job and the Gravel Grinder won't let you down thanks to it's double PPS puncture protection, while the vulcanised Race casing gives it that elegantly supple ride that marks Challenge's handmade tyres out from the rest. If you want a highly versatile, lightweight and tough tyre for your gravel bike, the Challenge Gravel Grinder is up to the task.
Make your mark on the gravel scene with the Gravel Grinder. This tyre combines a fast rolling diamond centre with aggressive shoulder knobs that only hook-up when the terrain gets soft, muddy, or a bit sketchy.Key Features:Colour: Black and Brown.,TPI: 120.,Recommended Pressure:,33mm 35-60psi.,38mm 32-53psi.,42mm 30-50psi.,46mm 25-35psi.,Puncture Protection: -.,Rubber Compound: Vulcanized.,Construction: Vulcanized.,Series: RACE.,Size: 650 and 700.,Width: 33, 38, 42 and 46mm.,Casing: Nylon Superlight.,Bead: Tubeless Folding..
Cyclocross World Champion for years. Whether a Pro or just a hardcore rider Grifo is the tyre you need. Unbelievable grip with no rolling resistance compromise. All tubular and open tubular produced by Challenge are special products. Machines are not able to produce them and the manual skill required in each step to obtain a good quality standard is very high. The casing is produced with the latest technical materials like Corespun (a cotton and polyester combination). Corespun is a thread from which we obtain a very supple and strong casing with low weights. The casings have a high TPI count that can reach over 300 tpi. Our production process avoids any vulcanisation process to enable all materials to keep their suppleness and flexibility. The tread is slowly hand glued on the casing which is previously mounted and inflated on a rim. By using this method the tread is relaxed on the casing and does not suffer any tension when inflated. The result of this is a lower rolling resistance, increase in comfort, more precise handling of the bike and better grip. Hand made tubulars are well known by professionals and is this type of tyre that is preferred for the long stage races. To give the best possible grip in curves Challenge uses the most updated materials to obtain flexibility, suppleness and this results in absorption of irregular surfaces giving to the cyclist the best possible contact patch. The wheel avoids jumping and the tyre will deform and absorb the irregularities acting in some way as a shock absorber. A special fabric is placed between the tread and casing to increase puncture resistance PPS (Puncture Protection System) technology. Comfort means reduction of harmful vibrations for the wrists and neck, these vibrations, will end causing inflammatory problems, as a hard tyre will transfer all the vibrations directly to the racer body. Classed as one of the best all-around cyclocross tyres every created by Challenge, this tyre excels in wet, dry, soft packed, rocky and root-infested course conditions. Technologies: Challenge Handmade Clinchers (HCL): These Handmade Clinchers are made from the same materials and processes as our handmade tubulars but instead of sewing an inner tube inside the casing is wrapped around a aramid bead to form a tire that fits on a clincher rim. The HCL is moulded flat, not in a horseshoe like a TLR or VCL. This shape allows the casing to naturally deform over surface imperfections and minimize rolling resistance. A tubeless tire is moulded in a U-shape to make the sidewalls rigid, so the system does not “burp” or lose air when it deforms after it encounters a surface imperfection. The tubeless tire’s stiff sidewall compromises its ability to equal a supple HCL with a latex inner tube.
Challenge Grifo Comp 700x33c Cyclocross TyresThe best all-around cyclocross tyre ever created excels in wet or dry, soft packed, rocky and root-infested courses, grass and more. The Grifo features fast-rolling knobs and a central section that offers excellent pedalling and braking traction.PPS technology places a layer of tough fabric beneath the tread to increase protection from cuts and punctures for everyday reliability. The aramid bead combines strength and lightness for better security and easier tyre fitting.Product DetailsIntended use: Cyclocross, fast gravelSize: 700x33cColour: BlackCasing: NylonTPI: 120Bead: AramidProtection: Puncture Protection Strip (PPS)Max. Pressure: 30-40PSI, 2.1-2.7 Bar
The best all-around cyclocross tyre ever created excels in wet or dry, soft packed, rocky and root-infested courses, grass and more. The Grifo features fast rolling knobs and a centre section that offers excellent pedalling and braking traction.Key Features:Colour: Tan.,TPI: 300.,Recommended Pressure: 30-40psi.,Puncture Protection: PPS.,Rubber Compound: SMART.,Construction: Handmade.,Series: PRO.,Size: 700.,Width: 33mm.,Casing: SuperPoly.,Bead: Folding.
The Challenge Grifo is the best all-round cyclocross tyre ever. Period. Designed to excel in wet or dry conditions, soft, packed, rocky or rooty it can handle it all. Not only does it have all the grip you ll ever need, but it also rolls quickly to boot. Look up all-rounder and you ll see the Challenge Grifo.Highly versatile tread pattern excels in all conditions260TPI SuperPoly casing gives an incredibly smooth and supple ride Handmade folding bead casing with PPS puncture protection Smart rubber compound for excellent grip and durability Not tubeless compatibleThe Grifo features a fast-rolling centre section, but it is the shape and formation of the rest of the tread that gives it the edge over the competition. The staggered and aggressive excel in all terrains and conditions, while Smart rubber compound is both grippy and highly durable.On tough CX courses, you need confidence that your tyres are tough enough for the job and the Chicane won't let you down thanks to its PPS puncture protection, while the handmade SuperPoly casing gives it that elegantly supple ride that marks Challenge's handmade tyres out from the rest. If you want a fast, lightweight and tough tyre for your CX bike, the Challenge Grifo is up to the task.
The best all-around cyclocross tyre ever created excels in wet or dry, soft packed, rocky and root-infested courses, grass, and more. The Grifo features fast rolling knobs and a centre section that offers excellent pedalling and braking traction.Key Features:Colour: Tan.,TPI: 300.,Recommended Pressure: 22-35psi.,Puncture Protection: PPS.,Rubber Compound: SMART.,Construction: Handmade.,Series: PRO.,Size: 28".,Width: 33mm.,Casing: SuperPoly.,Tube Type: Seamless Latex..
The Challenge Grifo is the best all-round cyclocross tyre ever. Period. Designed to excel in wet or dry conditions, soft, packed, rocky or rooty it can handle it all. Not only does it have all the grip you ll ever need, but it also rolls quickly to boot. Look up all-rounder and you ll see the Challenge Grifo.Highly versatile tread pattern excels in all conditions 260TPI SuperPoly casing gives an incredibly smooth and supple ride Handmade tubeless folding bead casing with PPS puncture protection Smart rubber compound for excellent grip and durability Tubeless compatible The Grifo features a fast-rolling centre section, but it is the shape and formation of the rest of the tread that gives it the edge over the competition. The staggered and aggressive excel in all terrains and conditions, while Smart rubber compound is both grippy and highly durable.On tough CX courses, you need confidence that your tyres are tough enough for the job and the Chicane won't let you down thanks to its PPS puncture protection, while the handmade SuperPoly casing gives it that elegantly supple ride that marks Challenge's handmade tyres out from the rest. If you want a fast, lightweight and tough tyre for your CX bike, the Challenge Grifo is up to the task.
Challenge Grifo Open Pro Cyclocross Bike TyreDeveloped for the rigours of modern cyclocross (CX) racing, this race-ready tyre provides exceptional grip and low rolling resistance as you tackle the more demanding of terrain and course conditions. Featuring a handmade construction, this clincher model's casing is produced with technical materials like Corespun (a cotton and polyester combination). Corespun is a thread from which Challenge obtain a very supple and strong casing with low weights. The casings have a high TPI count that can reach over 300 tpi and production avoids any vulcanisation process to enable all materials to keep their suppleness and flexibility. Handmade Cyclocross Clincher TyreThe tread is slowly hand glued on the casing which is previously mounted and inflated on a rim. By using this method, the tread is relaxed on the casing and does not suffer any tension when inflated. The result of this is a lower rolling resistance, increase in comfort, more precise handling of the bike and better grip.Increased Comfort, Flexibility and Puncture ResistanceTo give the best possible grip in curves Challenge uses materials to obtain flexibility and suppleness, which results in absorption of irregular surfaces giving to the cyclist the best possible contact patch. The wheel avoids jumping and the tyre will deform and absorb the irregularities acting in some way as a shock absorber. A special fabric is placed between the tread and casing to increase puncture resistance PPS (Puncture Protection System) technology. Classed as one of the best all-around cyclocross tyres ever created by the brand, the Challenge Grifo Open Pro Cyclocross Bike Tyre excels in wet, dry, soft packed, rocky and root-infested course conditions.Features: Use: Cyclocross Racing: All Around Soft Pack Tyre Type: Clincher Size: 700c Type Width: 33mm Internal Rim Width: 15-19mm TPI: 300 Bead: Aramid Casing: SuperPoly Flat Protection: PPS Recommended Pressure: BAR: 2.1-2.7; PSI: 30-40 Tubeless Ready: No Single or Pair: Single Weight: 355gTechnologies: Challenge Handmade Clinchers (HCL): This handmade clincher is made from the same materials and processes as the brand's handmade tubulars but instead of sewing an inner tube inside the casing is wrapped around a aramid bead to form a tyre that fits on a clincher rim. The HCL is moulded flat, not in a horseshoe like a TLR or VCL. This shape allows the casing to naturally deform over surface imperfections and minimize rolling resistance.Buy Challenge Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
The Grifo is Challenge's Cyclocross all-rounder; happy in a range of conditions from soft terrain to hard pack. The versatile tread rolls and grips well, making it a favourite for mixed conditions use.Versatile tread design works in a range of conditions, gripping and rolling wellSupple 120 TPI casing provides a smooth rideTubeless-ready bead can be used with tubes or tubelessHigh volume 700 x 33c sizeKey to the Grifo's performance is the tread design. The mid-height tread rolls well on hard surfaces but still has enough purchase in softer ground to provide excellent traction when braking, climbing or cornering. The Grifo's high-volume and supple 120 TPI casing ensures the tyre deforms well to the terrain, offering excellent comfort. The Grifo is the ultimate cyclocross all-rounder; if you're unsure of the conditions, the Grifo is the only choice.
Challenge Grifo Tubeless Vulcanised CX TyreThe Challenge Grifo is an exceptional all-around use tyre that's designed to provide fantastic grip when the terrain is loose, but to also roll fast when speed is a must. Featuring a central ramped tread profile to ensure that you get the best acceleration, plus aggressive side knobs, superb grip is activated when leaning into corners and when tackling technical trail sections. This tyre is engineered to be robust, reliable and dependable - the Grifo is a very worthy addition to your racing/training arsenal. Classed as one of the best all-around cyclocross tyres every created by Challenge, this tyre excels in wet, dry, soft packed, rocky and root-infested course conditionsFeatures: Tubeless Ready: Yes Use: Cross Training: All Around Soft Pack Size: 700 Tyre Width: 33mm Internal Rim Width: 15-19mm TPI: 120 Bead: Aramid Casing: Nylon BAR: 3.1-5.1 PSI: 40-75 Weight: 300gTechnologies: Vulcanized Tubeless Ready (VTR): The highest level of performance offered by car, truck and motorcycle tyre manufacturers is a vulcanized tubeless system. While this is an old technology for cars and trucks, for bicycles it is relatively new and did not even have an internationally accepted design standard (ISO or ETRTO) until recent years. By eliminating the inner tube it is possible to lower the weight and create a softer, more comfortable, more efficient, lower rolling resistance tyre system by running lower tyre pressure. Challenge started introducing Vulcanized Tubeless Ready (VTR) tyres in recent years because the ISO and ETRTO standards for proper VTR tire and rim fit have finally been completed. These standards ensure your safety and your ability to fit and service the tyres with hand tools. Buy Challenge Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.