21T Medius Pulley for FWD - Arrowmax AM-920041  [AM-920041]

Medius 21T pulley for front-wheel drive

The Arrowmax AM-920041 AM Medius FWD Pully 21T Aium 7075 is designed as an RC drive pulley for front-wheel drive (FWD) setups. It identifies a 21-tooth component manufactured from Aium 7075 and is intended as a like-for-like replacement or an aftermarket upgrade where a 21T FWD pulley is required.

To install on a compatible FWD pulley assembly: remove the existing pulley following your chassis service procedure, inspect shaft and bearing condition, fit the AM Medius pulley to the shaft, and secure with the original fixing hardware. Make sure the pulley runs true and bearings are seated correctly to avoid premature wear.

In tuning scenarios, swapping to a 21T pulley adjusts the drive ratio and can be used for measured changes in acceleration and drivetrain response. Combine this swap with controlled adjustments in the rest of the transmission to observe handling and motor load differences.

Fit the AM-920041 when a 21T FWD pulley is needed for tuning or replacement, and always check shaft and bearing condition as part of installation to maintain a reliable drivetrain.