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Thread: Speedometer Hubs

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    Speedometer Hubs

    School me on speedometer hubs. Are they interchangeable? (The part that fits inside the wheel hub.) As long as the hub fits the wheel, it should work? I'm guessing the ratio for speed and mileage is taken care of by the gearing inside the speedometer?
    1980 CM200T Twinstar

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    The speedo's all have the same gearing/ratio built into them. The drive is what determines the actual reading. More or less interchangeable but there are differences in the body of the drive that might make it not fit/work. The choice of drive is affected by the tire sizing. Look at the 1980 CM400T unit. It fits bikes that are running 18' and 19" wheels, the difference is the 19" wheels are running low profile tires.
    Jim O'Brien
    1979 CM400T aka the Roadbike, 1978 CB400T1 semi restored, 1972 CL350K4 restoration and the 1971 SL350K1 disaster zone.
    Plus 2 SL350K0's , 2 SL350K1's, 1 CL350K0 and 1 CL350K1 waiting for space and time
    Contact: 408-239-9580 or [email protected]

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    Alright, seems I had things backwards. Understood that tire size will effect the speedometer. So, an 18" hub drive is an 18" hub drive dependent upon fit to the wheel. No to do some checking and find some similarity among the drive units....
    1980 CM200T Twinstar

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