Product Overview
Hardrace Rear Roll Centre Adjuster 6764 – Honda S2000 AP1 / AP2 1999-2009
Lowering an S2000 drops the roll centre further than the body, so the lower arms end up at a steeper angle than Honda intended. This increases body roll and makes the rear more prone to bump steer, which is one reason a lowered S2000 can feel nervous over mid-corner bumps. Hardrace’s 6764 roll centre adjusters bring the arm angles back towards standard.
How they work
Each adjuster spaces the rear ball joint 15 mm from the hub. This moves the lower control arm back towards its original angle and raises the rear roll centre again. Hardrace says the result is less body roll, a more consistent tyre contact patch and quicker response to steering inputs, so you can carry more cornering speed with confidence.
- 15 mm increase in roll centre height
- Restores lower arm angle on lowered cars
- Helps reduce rear bump steer
- Supplied as a two-piece set for both rear corners
Who should fit them
These adjusters are meant for S2000s lowered on coilovers or lowering springs. On a car at standard ride height they would raise the roll centre above the factory position, so they are not recommended there. They are often fitted together with Hardrace’s front roll centre adjusters to keep the front-to-rear balance consistent. The front adjusters are a separate part.
Fitting advice
Fitting means separating the rear ball joint from the hub carrier on each side. Expect to need a ball joint splitter, and on older cars some penetrating fluid. Follow Hardrace’s instructions and tighten everything to the specified torques. Because the arm geometry changes, toe and camber will both shift, so a full four-wheel alignment is essential afterwards. Fitting by a garage or suspension specialist is recommended.
Useful links
Browse more suspension parts in our shop. For the manufacturer’s own information, see the Hardrace 6764 rear roll centre adjuster for Honda S2000 page.
