First Generation Derauiller Pulleys for Shimano road and MTB 10 and 11 speed - Hybrid Ceramic CERAMIC OVERSIZED DERAILLEUR PULLEYS The Aero Kolossos is equally

The Aero Kolossos is equally at home in road and crit racing

Each color is applied with a durable finish that resists corrosion and wear

Because when it comes to performance

The BSA30 Bottom Bracket is built to meet the demands of various riding styles

First Generation Derauiller Pulleys for Shimano road and MTB 10 and 11 speed - Hybrid Ceramic CERAMIC OVERSIZED DERAILLEUR PULLEYS The Aero Kolossos is equallyThese pulleys spin on Grade 3, Abec 5 hybrid ceramic bearings. The same bearings as our bottom brackets. Choose road bearings for lowest friction on road bikes or cross bearings if durability is key (that's for you, cross and gravel racers). The wheels are made of aluminum, which will make them more resistant to wear in muddy conditions. Out of the box, these pulleys will fit on: Shimano road and MTB 10 and 11 speed Campagnolo 11 speed Sram 2x MTB