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Whether you're shredding the trails
By replacing your stock pulleys with a ceramic 12-tooth top pulley and a 19-tooth bottom pulley
Thread Ring - Aluminum
low‑friction ceramic pulleys housed in sealed labyrinth bearings
This bottom bracket is compatible with a variety of bikes and comes with sealed options to suit your riding style
Shimano Speed Kolossos Oversized Derailleur Cage - 11 and 12 speed Dura Ace and Ultegra Color:Raw Whether you're shredding the trailsKogel Speed Kolossos for Shimano 11 & 12 Speed (Dura Ace & Ultegra): The Fastest Oversized Derailleur Cage Yet Speed is the name of the game. The all new Kogel Speed Kolossos for Shimano 11 and 12 speed Dura Ace and Ultegra is engineered for the ultimate balance of aerodynamics, efficiency, and durability. Designed for riders who refuse to compromise, this oversized derailleur cage system is the fastest Kolossos ever, fine tuned to shave watts and
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