Deore XT Di2 Drivetrain Upgrade Kit Baggy The Universal Fat Bike Fender Zipp takes a different The Universal Fat Bike Fender is designed to offer quick and easy installation so that riding with a fender can be a game time decision providing the best beam pattern for optimal visibility in even the most challenging conditions this derailleur stands up to harsh trail impacts and still retains its lightning quick shifting speed and high level of performance The all new DEORE XT M8250 long cage derailleur paired with a standard 10 51T M8200 cassette (sold separately) gives all types of riders the range and robustness to tackle every trail on the mountain