MUGEN MRX5 Aftermarket 24T 7075 Pulley - AM-MRX5-H0251K by Arrowmax  [AM-MRX5-H0251K]

Overview and application

The Arrowmax AM-MRX5-H0251K is a 24-tooth pulley made for MUGEN MRX5 belt-drive layouts, CNC-machined from 7075 T6 aluminium and treated with a hard coating to boost surface wear resistance. This spare is suited to tuning work where lower rotating mass and consistent belt engagement are priorities.

Side holes in the pulley let dust and small debris escape during running, which helps routine track maintenance. As a replacement part it prioritises durability and repeatable operation rather than changing final drive ratios.

Fitment tips: ensure the pulley sits true on the shaft, apply the belt tension your MRX5 instructions call for, and secure set screws to the torque values recommended by the chassis maker. Regularly check belt condition and the mating gear faces to avoid unpredictable drivetrain changes.