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Grant built his Crusher Bike by using a Shimano XTR mountain derailleur and attaching a WolfTooth Tenpan adapter. Alex Grant's 2019 Crusher Cannondale Topstone Carbon. © Brandon Cross / Gear Rush

Grant built his Crusher Bike by using a Shimano XTR mountain derailleur and attaching a WolfTooth Tanpan adapter. Alex Grant’s 2019 Crusher Cannondale Topstone Carbon. © Brandon Cross / Gear Rush