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Author Topic: Speedo Drive on Disc Fork  (Read 313 times)


  • Grand Gearhead
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Speedo Drive on Disc Fork
« on: December 30, 2012, 02:45:19 PM »
Hi everyone-

I'm putting a new disc front end on an old bike.  Can anyone help me by measuring the size of the hole in their speedo drive?

My drive is a metal-bodied one drilled to fit the narrower old-school axle, so I'll need to bore it out.  It won't fit over the new-style axle, and I can't tell what the diameter should be since I don't know where on the axle it needs to rest when assembled.  (It has two diameters plus a short, tapered transition between them...)