What is the best combination of 15 sprocket of tmx with sidecar?

The best combination for a 15-tooth sprocket on a TMX motorcycle with a sidecar typically involves pairing it with an appropriate rear sprocket to optimize torque and speed for stability and performance. A common choice is to use a 42-tooth rear sprocket, which balances acceleration and top speed, making it suitable for sidecar use. Always consider the weight of the sidecar and the load, as this may influence your final gearing choice. Testing different combinations can help find the optimal setup for your specific riding conditions.