XRay X4 CFF2 Rear Lower Arm Short Left XR303185-M

The XRay X4 CFF2 Rear Lower Arm - Short - Medium - Left, part XR303185-M, is a carbon-fibre rear suspension arm for the left side of an X4-series RC car. This short arm has a medium hardness and is designed to provide a more aggressive suspension response than the corresponding long arm.

Features

The shorter length allows more chassis roll and increases initial steering input. It is intended for tight or technical tracks, particularly where additional steering response is required in low-traction conditions. The trade-off is a more challenging driving response compared with a long arm, so setup and driving style may need to be adjusted.

The CFF2 construction combines a carbon-fibre lower arm with composite plastic detailing. This keeps the suspension component lightweight while providing the rigidity needed for consistent suspension movement. The revised geometry places the shocks further outboard, helping to alter the car's traction and steering response across different track conditions.

A dedicated pivot-ball design makes assembly straightforward while retaining a secure connection during use. This version is intended for the left rear position and is supplied as a single short, medium-hardness lower arm.

Suggested Setup

The manufacturer recommends using this arm in combination with the #301028 Hudy Spring Steel 1.2 mm Short, medium-hardness rear lower arm spring. This suggested setup is aimed at making use of the short-arm characteristics on tight or technical circuits.