This replacement 20T servo arm is milled from 7075-T6 aluminium and sized for Promoto-MX platforms produced for LOSI. It fits at the servo output to provide a direct mechanical connection to the brake linkage, allowing adjustment of servo geometry and braking response without altering the electronics.
Delivered as a pair to suit common dual-link brake configurations on Promoto-MX bikes. Fitment is model specific, so check the compatibility list prior to installation. Typical installation steps include removing the stock arm, aligning to the servo spline, and fastening with the original hardware.
LOS261013,LOS262009
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