LOSI PROMOTO-MX Front Brake Caliper Replacement MX035 7075 by GPM  [MX035]

Rigid front caliper for PROMOTO-MX builds

MX035 is a front brake caliper option manufactured from 7075 aluminium for LOSI PROMOTO-MX 1/4 motorcycle RTRs, intended as a scale replacement to increase mounting rigidity in brake assemblies. The passage below explains fitment considerations, installation, and its contribution to brake setup without suggesting use on real motorcycles.

Replacing the stock plastic caliper with this aluminium unit provides a firmer anchor for the brake interface and secures the supplied threaded parts. The caliper uses the original mounting pattern so it interfaces with the existing actuating linkage and the brake disk supplied with the identified PROMOTO-MX RTR kits.

For everyday hobby fitments on the listed PROMOTO-MX kits, this caliper is a practical metal swap that helps maintain brake feel under load and keeps fasteners secure; check disc spacing and linkage travel during installation.