Repairing cracked wheels can be a difficult and extremely important element of an alloy wheel repair. The issues with cracked used wheels range from slowly leaking air for a small crack up to potential blow outs for large cracks. With time and added stress any crack can wide and spread to the point where the car, truck or motorcycle rim is no longer safe to drive on. Proper cracked used rims welding is a time consuming and delicate process. Do not use quick fix solutions such as sealing compounds, the problem is more serious than that. We consider a steel or aluminum alloy magnesium rim wheel to be non-repairable if cracks appear near the base of your spoke, near the lug area or on the inner lip of the wheel away from the spokes. However if the crack is small enough it is typically salvageable with a proper rim repair.