Bushings

Fork Bushing Buying Guide

Fork bushings are the unsung heroes of suspension performance. They're thin-walled bronze and PTFE-coated sleeves pressed into the lower legs, guiding the stanchions through their travel with minimal friction. When they wear out, no amount of oil changes or seal replacements will make the fork feel right again.

How Bushings Wear

Bushings wear from lateral loads — cornering forces, brake dive, and riding with a wheel slightly out of true all accelerate wear. Grit that gets past the dust wipers acts as an abrasive between the bushing and stanchion. Most forks have two bushings per leg (one at the top of the lower, one at the bottom), and the upper bushings typically wear faster because they see more side load.

Symptoms of Worn Bushings

Grab the fork lowers and try to rock them side to side — any play means the bushings are worn. Stiction on small bumps (the fork feels sticky rather than supple through the first few millimetres of travel) is another telltale sign. If you can hear a clunking sound when loading and unloading the front wheel, the clearance between bushing and stanchion is too large.

OEM vs Aftermarket

OEM bushings from RockShox and Fox are standard bronze DU bushings with a PTFE liner. Aftermarket options from Enduro Bearings and SKF use different liner materials — some use Igus polymer bushings that reduce stiction further. The real-world difference is subtle but measurable on a friction dyno. For most riders, OEM bushings are perfectly adequate. If you're chasing the last bit of small-bump sensitivity, the aftermarket options are worth trying.

Replacement

Bushing replacement requires pressing the old ones out and the new ones in — this needs a bushing removal/installation tool and care to avoid scoring the inside of the lower legs. It's one of the few fork service jobs where most riders are better off sending the lowers to a suspension service centre rather than doing it at home. Tolerances are tight and a cocked bushing will score your stanchions.