The grifo 33 team edition tubular cyclocross 700c tyre from challenge is the ideal tyre for cyclocross racers looking for that extra edge on the competition the medium depth evenly spaced tread pattern allows all grip and no slip whilst being able to run a range of pressures this teamed with the corespun cotton casings help you to push your limits with confidence inspiring grip and traction available in blackcream sidewall in 700 x 33c