SRAM Pulley Wheels

Replacement jockey wheels for SRAM rear derailleurs — the GX AXS 12-speed kit and the X9/X7/GX 10-speed pair. A small part that makes a surprising difference to how a drivetrain sounds and feels.

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The wear item nobody looks at

Pulley wheels — jockey wheels — are the two small cogs in the rear derailleur cage that guide the chain. They spin constantly, they collect every bit of grit the chain picks up, and their teeth wear into hooks long before anyone thinks to check them.

A drivetrain with worn pulleys is noisy, feels slightly draggy and shifts less crisply, and the usual reaction is to blame the cable or the chain. If everything else is new and it still sounds rough, look here.

They are speed and model specific, so match them to your derailleur rather than the cassette. Part of the wider SRAM drivetrain range.