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The original Challenge tread and a perennial World Championship winnerthe Grifo has been updated with a more-supple 300 TPI casing in the UCI-legal maximum width of 33mm
Casing change helps to increase gripcomfort for the riderand tire volume
Tread pattern is the best all-rounderwith great grip but no loss in terms of low rolling resistance - designed for almost all course conditions other than extremes
