Bicycle disc rotor truing gauge (for 12mm thru-axles)
thingiverse
Just unbolt your 12mm thru axle, and put this gauge between the thru axle and the fork. Screw in a long m5 bolt into one of the two m5 hole as the gauge to see how true/bent the rotor is. Spin and true the rotor with a plier. Supports 160mm or 140mm.
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