his is the 24T, 26T, 28T, 30T Tooth Optional 4140 chrome Steel Pinion Speed Tune Gear Set. (for use with Savage XS 64T idler gear)

CNC Machined Lightweight Precision Gears with Standard 4140 steel
Reduce internal rotating mass and Increase efficiency.
Casehardened for durability.
Heavy duty 4mm set screw for brushless power
Laser engrave number of teeth on the gear

One pinion gear each (24T, 26T, 28T, 30T)
With set screw 4x4mm w/.5 pitch threads

2.0mm hex wrench to install the set screw

length: 12mm
Base diameter: 9mm

This gear is designed for 48 pitch HPI Savage XS but can be use with any car use 48pitch gaer 1/8 motor shaft.