Please make sure the spur gear have the same pitch(Mod 1) to work with,5mm hole diameter is suited for 5mm shaft
The M1 pinion gear sets are made of hardened steel,durable and reusable.
Compatible with Arrma Traxxas Axial HSP Redcat Losi 1/8 1/10 Scale RC Car Truck Buggy.
Universal upgrade Mod 1 pinion gear,total 4Pcs,15T 16T 17T 18T with 5mm inner diameter.Come with grub screws.Easy to install and upgrade.
The variety of tooth pinions allows for more gear setups,for different racing track conditions.To avoid the ESC/motor overheat,please check the ESC and motor temperatures regularly throughout the run after change the pinion gear.