A wheelchair basketball club frequently damage their wheels and find it difficult and expensive to get them straightened at bicycle repair shops, whose jig are made for bicycles which have different spindles from wheelchairs.
A simple jig was made that can be stored and transported easily and used while seated (unlike bicycle jigs which are floor mounted for use by someone standing). The out-of-true is indicated by the adjustable plastic finger in contact with the wheel rim to identify which spoke(s) need adjusting.