Shibata 4mm Knuckle Stopper

A 4mm diameter aluminum Knuckle Stopper originally developed for and included with the GRK5-R HRP Full Kit.

Designed to achieve an even greater maximum steering angle, this stopper provides additional clearance for high-angle drift setups.

Other than the reduced diameter of 4mm, the specifications are the same as the GRK Lightweight Knuckle Stopper (R31S332).

Important Note:
The 4mm Knuckle Stopper reduces the safety margin compared to the conventional Knuckle Stopper in order to maximize steering angle.

Depending on the vehicle setup, the steering knuckle may enter a reverse-lock condition at full counter-steer, potentially causing the steering to lock.

If this occurs, do not use this product, as it may place excessive load on the steering servo and cause damage.