Yokomo YR-10US Graphite Front Upper Arm Support for YR-10F  [YR-10US]

Front Upper Arm Support: Compatibility Notes

This graphite front upper arm support is produced for 1/10 scale formula cars and is intended to fit the YR-10F chassis. As an aftermarket replacement it offers a stiffer mounting surface than the original plastic item, helping to refine steering inputs and overall predictability.

The item installs at the front upper arm pivot and is compatible with the original arm pins and mounting hardware found on YR-10F setups. Fitting typically requires disassembly of the front suspension, a fit check to ensure correct alignment, and verification that the arms operate freely through their range after refit.

In terms of setup, using graphite increases stiffness at the upper link location, which reduces flex under load and can produce a more repeatable steering feel. It is often used by competitors seeking consistent geometry while adjusting camber or roll centre position via arm placement.