- Challenge Grifo XS 32 Cross Tubular Tyre
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Challenge Grifo XS 32 Cross Tubular Tyre
Multi Cyclocross Champion for years. Tread designed for speed on hard, dry terrains.
Top Features of the Challenge Grifo XS 32 Cross Tubular Tyre
- Use: Cyclocross - dry conditions
- TPI: 260
- Size: 28 x 32
- Weight: 415g
- Carcass: Super Poly
- Tyre pressure rating in BAR: 2 - 6
- Tyre pressure rating in PSI: 28 - 87
|Puncture Protection:||Puncture Protection System|
|Wheel Size:||700c (622)|
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. Challenge's 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.
About Cyclocross Tyres
Cyclo Cross tyres are for use with road wheels to allow them to be ridden off road. They range from 30 to 35mm wide and are designed with different tread patterns to suit the various conditions that can be encountered during the Cyclo Cross season. Usually at the start of the season the ground is dry and hard so a narrower low tread tyre is needed as low rolling resistance is a priority. Later in the season when the ground is wet, grip is a priority so a wider tyre with increased tread would be the better option.
About the Challenge brand
In 2003 Challengetech created its own brand “Challenge”. Challenge, as the word says, wants to point out how difficult and exciting it is to keep the tradition of high quality products, created with obstinacy, with the steady research of special materials and through handcrafted processes. Since the 2000s, Challengetech has being producing tubulars for other brands, thanks to the constant use of these products in the professional cycling.
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