Gear Speed is the best gearing tool for your brushless RC car. Forget the slow web calculators with limited features. Gear Speed was designed for you and your speed quest.

Gear Speed calculates your maximum speed. It stores your setups, allows you to include notes for your runs and your setup changes. You can also email this information for permanent record keeping.

Calculates: Speed (MPH/KPH), RPM, Final Drive Ratio, Rollout (now in Inches and MM).
Given: Pinion Size, Spur Size, Transmission Ratio, Tire Diameter (inches/mm), Motor KV, LiPo cell count and cell voltage.

Gear Speed now handles from 1S to 12S LiPo batteries.

Please contact us at ussapps.com to let us know how to make this app even better. Happy racing!

* Note: The above screens are sample setups, you will need to enter your own car's information.