Pay in 4 interest-free payments of $56.25 Learn more
Ships within 48 hours · Estimated delivery Aug 16 - Aug 21
Replacing your stock pulleys with a ceramic 12-tooth top pulley and a 19-tooth bottom pulley
just listen to our friend and badass racer Allison Linnell
BR-RX400-R
fine‑tuned to shave watts and maximize drivetrain performance
Our Performance Bundle offers a noticeable improvement in your drivetrain at a competitive price
Shimano Speed Kolossos Oversized Derailleur Cage - GRX 2x (11- and 12-speed, mechanical & Di2) Color:Black Replacing your stock pulleys withKogel Speed Kolossos for Shimano GRX 2x (11 & 12 Speed, Mechanical & Di2): The Fastest Oversized Derailleur Cage for Gravel Gravel doesnt mean slow. The all new Kogel Speed Kolossos for Shimano GRX 2x (11 & 12 speed, Mechanical & Di2) is designed to bring unmatched efficiency and performance to mixed terrain riding. Whether you're racing gravel, tackling epic adventures, or just looking for a smoother, more efficient drivetrain, this oversized
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