All tubular & open tubular produced by Challenge are special products. Machines are not able to produce them & 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 &40;a cotton & polyester combination&41;. Corespun is a thread from which we obtain a very supple & 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 & flexibility. The tread is slowly hand glued on the casing which is previously mounted & inflated on a rim. By using this method the tread is relaxed on the casing & 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 & better grip. Hand made tubular are well known by professionals & is this type of tire 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 & this results in absorption of irregular surfaces giving to the cyclist the best possible contact patch. The wheel avoids jumping & the tire will deform & absorb the irregularities acting in some way as a shock absorber. A special fabric is placed between the tread & casing to increase puncture resistance PPS &40; Puncture Protection System&41; technology. Comfort means reduction of harmful vibrations for the wrists & neck these vibrations will end causing inflammatory problems as a hard tire will transfer all the vibrations directly to the racer body.
Details: Use Road racing Size 28&34; Width 22&34; Weight 250 gr TPI 300 Bead Carcass Silk BAR 7-14 PSI 101-203
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All tubular & open tubular produced by Challenge are special products. Machines are not able to produce them & 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 &40;a cotton & polyester combination&41;. Corespun is a thread from which we obtain a very supple & 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 & flexibility. The tread is slowly hand glued on the casing which is previously mounted & inflated on a rim. By using this method the tread is relaxed on the casing & 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 & better grip. Hand made tubular are well known by professionals & is this type of tire 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 & this results in absorption of irregular surfaces giving to the cyclist the best possible contact patch. The wheel avoids jumping & the tire will deform & absorb the irregularities acting in some way as a shock absorber. A special fabric is placed between the tread & casing to increase puncture resistance PPS &40; Puncture Protection System&41; technology. Comfort means reduction of harmful vibrations for the wrists & neck these vibrations will end causing inflammatory problems as a hard tire will transfer all the vibrations directly to the racer body.
Details: Use Road racing Size 28&34; Width 22&34; Weight 255 gr TPI 320 Bead Carcass Super Poly BAR 7-14 PSI 101-203
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Open tubular differ from traditional clinchers for the construction. The Tyre is produced just like a tubular & uses the same materials & production process. Instead of being sewed with an inner tube inside at the end of the process beads are made by folding the casing around Aramid fibers threads. For this reason an open tubular gives very similar ride feel of that of a tubular mainly if a latex inner tube is used. Mounting an open tubular on a wheel is the same as mounting a standard clincher but with the advantage of riding a much more comfortable & performing tyre.
Details: Use Road Size 622/700&34; Width 23&34; Weight 200 gr TPI 260 Bead Aramid Carcass Super Poly BAR 7-10 PSI 101-131
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Open tubular differ from traditional clinchers for the construction. The Tyre is produced just like a tubular & uses the same materials & production process. Instead of being sewed with an inner tube inside at the end of the process beads are made by folding the casing around Aramid fibers threads. For this reason an open tubular gives very similar ride feel of that of a tubular mainly if a latex inner tube is used. Mounting an open tubular on a wheel is the same as mounting a standard clincher but with the advantage of riding a much more comfortable & performing tyre. Herringbone tread design & supple casing provide great handling of the bike on both wet & dry conditions.

Details: Use Road Size 622/700" Width 23" Weight 225 gr TPI 260 Bead Aramid Carcass Super Poly BAR 7-10 PSI 101-131

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The Challenge Eroica was designed for gravel racing. It has the same tread pattern as the proven Paris Roubaix. The Eroicas low rolling resistance with increased casing volume achieving a new level of control puncture resistance & comfort.
Features:622/70030mm Width 280 grams 260 TPIAramid Bead Super Poly Casing Handmade
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Pros choice for perfect traction in wet muddy conditions.

Details: Use Cyclocross Size 28&34; Width 33mm Weight

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Same structure as the Criterium with a more aggressive tread designed for wet or slippery conditions.

Details:

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Same structure as the Criterium with a more aggressive tread designed for wet or slippery conditions.

Details:

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Classic herringbone tread with a supple casing for long smooth training rides.

Details: Use Road Size 622/700&34;

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Cyclocross World Champion for years. Whether a Pro or just a hard core rider Grifo is the tyre you need. Unbelievable grip with no rolling resistance compromise.

Details: Use Cyclocross Size 622/700" Width 32" Weight 380 gr TPI 60 Bead Aramid Carcass Nylon Black sidewall (photo shows shown is Grifo Handmade Open tyre) BAR 31-51 PSI 40-75

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