Millway Motorsport Uniball Rear Trailing Arm Bushes (RTAB) for BMW E36, E46, M3 & Z4

Upgrade your BMW's rear suspension with the Millway Motorsport Uniball Rear Trailing Arm Bushes (RTAB), engineered for drivers who demand maximum precision, stability, and suspension performance. Designed for the BMW E36, E46, E46 M3, Z4 and Z4M, these motorsport-grade spherical bearing bushings replace the factory rubber RTABs, eliminating unwanted deflection and maintaining consistent rear suspension geometry under the most demanding driving conditions.

Whether you're building a dedicated track car, drift car, or high-performance road car, Millway's Uniball RTABs deliver sharper handling, improved rear-end control, and more predictable vehicle behaviour.

Vehicle Compatibility

Suitable for:

• BMW E36 3 Series

• BMW E36 M3

• BMW E46 3 Series

• BMW E46 M3

• BMW Z4 E85

• BMW Z4 E86

• BMW Z4M

Eliminate Rear Suspension Deflection

The factory rear trailing arm bushings are designed for comfort, but under heavy cornering, braking, and acceleration they allow unwanted movement that can alter rear toe and suspension geometry.

Millway Motorsport's spherical bearing conversion eliminates this compliance, ensuring the rear suspension remains accurately positioned throughout suspension travel and load changes.

Key Benefits

✔ Eliminates rear trailing arm bushing deflection
✔ Maintains consistent rear toe and camber settings
✔ Improves rear-end stability under load
✔ Reduces unwanted rear steer effects
✔ Enhances traction and corner exit performance
✔ Delivers sharper suspension feedback

Motorsport-Grade Spherical Bearing Design

At the heart of the system is a premium motorsport spherical bearing housed within a precision-machined aluminium carrier.

Unlike conventional rubber or polyurethane bushings, the uniball design allows smooth suspension articulation while completely removing unwanted flex.

Advantages of Uniball RTABs

• Zero compliance under load

• Improved suspension accuracy

• More predictable handling characteristics

• Superior alignment consistency

• Increased chassis feedback

• Ideal for performance and competition use

Premium Billet Aluminium Construction

Manufactured from high-quality billet aluminium, the Millway RTAB kit is engineered for exceptional strength and durability.

Construction Features

• Lightweight billet aluminium housings

• Motorsport-grade spherical bearings

• Precision-machined components

• Corrosion-resistant finish

• Designed for long-term reliability

Built to withstand the rigours of track use, drifting, and motorsport competition.

Maintain Precise Rear Geometry

One of the biggest benefits of upgrading to spherical RTABs is the ability to maintain accurate suspension geometry under load.

Performance Benefits

• Improved rear axle stability

• Consistent alignment settings

• Better tyre wear during aggressive driving

• Enhanced cornering balance

• Increased driver confidence

• More predictable handling at the limit

Perfect for drivers looking to maximise the performance of the BMW E36, E46, or Z4 chassis.

Complete Kit Supplied

Each kit includes everything required for installation:

What's Included

• 2 x Millway Motorsport Uniball Rear Trailing Arm Bushes

• Integrated Motorsport Spherical Bearings

• Threaded Locking Rings

• Installation Sleeves

Supplied as a pair for one vehicle.

Ideal for Track, Drift & Performance Road Cars

These rear trailing arm bushings are a popular upgrade for:

• Track Day Cars

• Time Attack Builds

• Circuit Racing

• Drift Cars

• Fast Road BMWs

• Suspension Geometry Optimisation

Drivers consistently report a more planted rear end, improved rear suspension feedback, and greater confidence during aggressive driving.

Why Choose Millway Motorsport?

Millway Motorsport is recognised throughout the BMW performance community for producing race-proven suspension components designed to improve handling precision, durability, and chassis performance.

Their Uniball RTAB conversion is one of the most effective rear suspension upgrades available for the E36, E46, and Z4 platforms, providing true motorsport performance and uncompromising geometry control.

Upgrade Your BMW Rear Suspension Today

If you're looking to eliminate rear trailing arm flex, improve alignment stability, and maximise rear suspension performance, the Millway Motorsport Uniball Rear Trailing Arm Bushes (RTAB) are the ultimate upgrade for your BMW E36, E46, M3, Z4 or Z4M.

Sold as a pair.