Save $14 compared to purchasing all three sprockets individually.

The Amp QS 138 V3 520 Tuning Pack includes one 12T, one 13T, and one 14T sprocket for QS 138 70H V3  geared motors with the 17/14 mm spline output shaft. Get three popular gearing options in one package and quickly tune your bike for acceleration, trail riding, racing, or top-speed applications.   Full Product Description The Amp QS 138 V3 520 Tuning Pack is the most economical way to purchase three popular gearing options for QS 138 70H V3 geared motors. This package includes one 12T, one 13T, and one 14T sprocket, allowing you to quickly experiment with different gearing combinations and find the setup that best matches your riding style, terrain, wheel size, and performance goals. Each sprocket is precision machined from hardened steel and designed specifically for the 17/14 mm spline output shaft used on compatible QS 138 70H V3 geared motors. Developed based on direct feedback from the Electric Motorcycle Builds community, these sprockets provide a high-quality alternative to factory options while offering multiple gearing choices for racing, trail riding, street use, and custom builds. Whether you’re looking for maximum acceleration, a balanced all-around setup, or increased top speed, this tuning pack gives you the flexibility to dial in your gearing without having to place multiple orders.