Park tm1 spoke tension meter 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 affordably the tm 1 works on nearly any bicycle spoke no matter what the diameter material or shape the tm 1 is for anyone building or truing wheels diagnosing wheel problems or assembling new bikes its a tool that belongs on every workbench tight and uniform