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Ceramic/steel Bearing Rd 11t Pully Wheel For Shimano, Sram Campagnolo Rear Derailleur Aluminum Alloy Wheels - Bicycle Crank & Chainwheel - AliExpress
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Shimano Derailleur Pulleys - 11spd (also fits Etap & Campagnolo) - Hybrid Ceramic 12/12T - Black – Kogel Bearings
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