Well its about dang time that someone made a truing bar that mounts to your bike. Straighten your wheels on the fly, with the Pro Wheel Trackside Truing Bar.
Simply attach and tighten the tool over your axle. Adjust the point of reference to the rim. Spin the wheel keeping an eye on the point to determine the spots on the wheel that are out of true. And tighten the spokes accordingly. Using this tool every time you check your spokes/wheel will keep your wheel strong and true. The universal design works on front and back wheels from 10" to 21". Also provided with a washer to mount the tool to the select few models with flush axles. And it fits in your tool box.