Description
A properly sized countershaft sprocket is critical to your bike’s acceleration, top-end speed, and overall drivetrain efficiency. The JT Sprockets 13-tooth countershaft sprocket delivers the precision engineering and material quality that racers depend on, whether you’re chasing lap times on the track or dialing in your street bike’s power delivery. Built from premium Japanese steel alloys and computer-designed for optimal strength-to-weight ratio, this bolt-on upgrade ensures reliable power transfer lap after lap.
- Teeth: 13T
- Material: C45 / SCM415 steel
- Design: Computer-optimized
- Construction: High-carbon Japanese steel
- Installation: Bolt-on
- Quality: Exceeds OEM standards
- MPN: JTF565.13SC
- Weight: Minimal for strength









