Challenge Grifo 33 Open Cyclocross Tyre WITH FREE TUBE

Product Description

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 33mm Weight 340 gr TPI 300 Bead Aramid Carcass Super Poly BAR 2
- 6 PSI 28-87 CHALLENGE TUBULARS HAND MADE: 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 tubulars 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.