Reviews over the

Challenge Grifo Pro Open 33

is a very good tyre for on different surfaces. Not so easy to fit, though, due to the tyre's stiffness.

Pros & Cons

Fine tyre, low rolling resistance, good cornering grip, very flexible. Disadvantage ; first time on the rim. Sprayed with some Teflon spray and then it went.

Hi quality tyre , very flexible ideal for cyclocross or gravel trails Patience is require to fit these tyres due to the construction design but when fitted give a compliant ride ,recommend latex tubes with this product

Pros & Cons

This tyre is almost perfect for multi surface cyclo cross racing. Good in most conditions and most surfaces bar deep mud. My only gripe, and why I can't give 10/10 is the fact it will not stay on my Stans Alpha rims due to the year drop shaped bead! Fine on every other rim I have tried but the slightest pressure from a dropped curb, cycle cross hurdle or flying remount pops it straight off the rim. My Scwalbe 1 tyres and Clement pdx don't have this issue.

Pros & Cons

Challenge Grifo tyres excellent on gravel ,mud and amazingly good roll resistance on tarmac ,definitely recommend them

Pros & Cons

Challenge Grifo tyres excellent on gravel ,mud and amazingly good roll resistance on tarmac ,definitely recommend them

Pros & Cons

Worth the blood and tears to get them