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Challenge Grifo Tubular Cyclocross Tire 2013 
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The original Challenge tread and a perennial World Championship winner, the Grifo has been updated with a more-supple 300 TPI casing in the UCI-legal maximum width of 33mm
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Casing change helps to increase grip, comfort for the rider, and tire volume
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Tread pattern is the best all-rounder, with great grip but no loss in terms of low rolling resistance - designed for almost all course conditions other than extremes
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28-87 PSI, 415 grams
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