Tamiya F103RM Rear Axle Offset Spacer - F103RM-03 by 3Racing  [F103RM-03]

Adjustable rear axle spacer details

This F103RM-03 spacer fits the Tamiya F103RM chassis and lets you alter the rear axle mounting plane up or down in small increments. It is a tunable component that targets rear track and toe behaviour without altering major suspension parts.

Fitment and function: the spacer repositions the axle mounting to affect rear geometry, helping tweak corner entry, rotation and mid-corner grip. It is suitable for racers and advanced hobbyists who refine chassis balance at the axle and wheelbase level.

Installation guidance: the spacer replaces or stacks with the factory axle spacer pieces on the rear axle assembly. Use common 1:10 touring car tools and confirm axle preload and wheel alignment after installation. Always check body and suspension clearance after changing the offset.

Use the spacer as a measured tuning step when dialing rear-end grip and turn-in; combine adjustments with lap testing to find the best balance for your track surface.