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These adapters will allow you to accurately measure caster using setup stations such as Hudy, G-Force, Integy, etc..
Fits on top of all CRC pro-strut steering blocks. Insert a 2" length of 1/16" (0.062) music wire into the top of the adapters. You can also secure the wire with 4-40 set screws, but these are not necessary. The music wire will point to the current caster angle. Two holes are provided for the wire to accommodate both inline and trailing axle setups.