If you are building your own bike wheels or if you are just periodically truing your wheels, you'll love this tool. Correct spoke tension is very important. This tool will help you to set the proper tension to own your wheels to give you the best that your wheels can be.The cornerstone to strong and reliable wheels is having the spokes properly and uniformly tensioned. The TM-1 Tension Meter accurately and reliably measures the absolute tension of each of the spokes in a wheel, as well as the relative tension between all the spokes in a wheel. Easy to use and priced right, the TM-1 works on nearly any bicycle spoke - no matter what the diameter, material, or shape. Not just for the experienced mechanic, the TM-1 is for anyone building or truing wheels, diagnosing wheel problems, or assembling new bikes. Includes: tension meter, deflection conversion card, spoke gauge and instructions.