How to True a Mountain Bike Rim: A Step-by-Step Guide to Achieving a Perfectly Balanced Wheel
To true a mountain bike rim, first, remove the tire and adjust the spoke tension by turning the spoke nipples with the help of a spoke wrench. Use a spoke wrench to tighten/loosen spokes until you have the desired tension, while still making sure the rim remains centered and straight. Spin the wheel and check where it wobbles or rubs against the brake pads or frame. Tighten the loose spokes or loosen the tight spokes until the wheel runs straight and true. Reinstall the tire and double-check the true, roundness, and tension of the wheel.