RTAB's, Rear trailing arm bearings

Syncro Design Works Rear Trailing Arm Bearings for BMW E36, E46 & Z4

Ready to make your BMW handle like new again? Syncro Design Works Rear Trailing Arm Bearings (RTABs) are the ultimate upgrade for your E36, E46, or Z4. We designed these bearings to fix a common weak spot in your car's suspension, giving you a new level of precision and durability on the road or at the track.

Why are the old bushings a problem?

The factory rubber bushings in your trailing arm are a major control point for your rear wheels. Over time, they wear out and get soft, allowing the wheels to move around more than they should. This can make the back of the car feel squirmy or unstable, especially when you hit the brakes hard or get on the gas. If you've upgraded your car with more horsepower or sticky tires, you've probably noticed this even more. Our bearings are a permanent fix that keeps your suspension geometry perfect.

What makes our bearings so special?

Unlike a simple gate hinge motion from the original bushings, our RTABs use a high-quality bearing that allows for full, multi-axial movement. This means your suspension can articulate exactly as it was designed to, giving you better, more predictable handling. Plus, they're sealed and lubricated for life, so once they're in, you'll never have to worry about them again. In fact, our own shop car has had the original prototype bearings installed since 2009 with zero issues.

Installing Your New Bearings

While we always recommend having a pro install these, a confident DIYer can absolutely get the job done at home. The most important thing is to use our specialized RTAB Installation Tool. We can't stress this enough—if you install the bearings incorrectly, they can be damaged and won't work properly, which would also void your warranty. Please note: many other RTAB tools on the market are designed specifically for rubber bushings and can permanently damage the sensitive spherical bearing. Our tool is custom-designed to ensure they're pressed in perfectly, protecting your investment. You can borrow the tool for a fully refundable deposit, and all you have to cover is the return shipping.

If your car feels a little twitchy or has an unsettling "rear-steer" feel, it's probably time for an upgrade. Switch to Syncro Design Works RTABs and get back the crisp, confident handling your BMW is known for!