Tamiya 42309 37T Aluminum One-Way Pulley Upgrade  [42309]

Performance Upgrade for Touring Cars

The Tamiya 42309 - 37T Aluminum One-Way Pulley is a practical upgrade for racers wanting crisper handling from their touring car. Replacing the factory plastic pulley with this aluminum unit helps the drivetrain run more efficiently and can improve traction through medium-speed turns.

Advantages of Aluminum Construction

Aluminum increases longevity and gives steadier power delivery, especially with the HL coating that reduces friction. For club racers and dedicated hobbyists, this change brings more consistent lap times and reduced wear under load.

Models That Accept This Pulley

The pulley fits multiple Tamiya chassis, including the TRF419, TRF419X, TRF418 and TA07, and any car using a direct coupling or spool. That versatility makes it simple to drop this upgrade into many existing rigs.