Bicycle Wheel Out Of Round. The following steps will show you step by step how to true wheels. If the wheel becomes out of round it wobbles up and down with each revolution.
If the rim is offset in the frame to either side it may be difficult to adjust the brakes. If there is such a flat spot more than 2 or 3 millimeters deep the wheel should first be taken to a well equipped bike shop which has a special tool for pulling out dents of this sort. Keeping the wheels true which means perfectly straight and round requires equal tension from all the spokes and it s critical to bicycle safety and performance.
This refers to the rim being centered in the frame.
2 hold one spoke between your index finger and thumb and wiggle it. 1 loosen all spokes until you can see 4 threads below each nipple. This is the amount of up and down wobble. In severe cases this will affect brake pad placement and can be felt by the rider as a bump every wheel revolution.