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Kolossos ensures maximum drivetrain efficiency
By replacing your stock 12-tooth pulleys with a 14-tooth top pulley and a 19-tooth bottom pulley
Change up your Kolossos Oversized Derailleur with our anodized titanium screws
No need for a longer chain
Our 2-pack aluminum bottle cages work with standard bottle-cage mounts and are available in three colors
First Generation Derauiller Pulleys for Campagnolo 11 speed - Hybrid Ceramic WHEEL BEARINGS Kolossos ensures maximum drivetrain efficiencyThese 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
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