markwesti

I have a Shimano 600 hub with a 6 speed cassette , vintage 86' Will a Dura Ace 7400 cassette and freewheel fit ? Or will the Dura Ace cogs fit the 600 freewheel ? Thanks .

Jeff Wills

OK- do you have a cassette or a freewheel? They are not the same: Freewheel or Cassette?

If both are freewheel then the parts are 100% interchangeable. If both are cassette, then the splined cogs are interchangeable but the outer (threaded) cog is not. If one is cassette and the other freewheel, nothing is interchangeable.

markwesti

Sorry about the confusion , I should have said 6 speed gear cluster . But I think you answered my question , a Dura Ace freewheel and 6 speed gear cluster will fit my 600 freewheel hub . Thanks .

Flyingblind9

Pardon my nitpicking of terminology, but be careful with this. The number of gears in the back still cannot determine if it is a freewheel or a cassette. A freewheel threads onto the wheel hub. A cassette has cogs that slide onto splines which are incorporated into the wheel's freehub. More often than not, many people misplace the terms of freehub and freewheel quite regularly.


Dave Mayer

6-speed cassette - this means Uniglide cogs. 5 of the 6 Dura-Ace cassette cogs will fit on your Uniglide hub. The outer Dura-Ace cassette cog is unique and will not fit the diameter of your freehub body.

Dura-Ace cassette cogs fitting a 600 freewheel body? That's tough. I've done a lot of Franken-modding of bike parts, but I've never attempted this. It would require a heavy duty metal press or perhaps an industrial-strength laser cutter. The cassette cogs have a smaller inside diameter than freewheel cogs, so you'd have to remove a lot of material.

Fitting a freewheel on a cassette freehub body: that is tough too. I've never tried this. Interestingly, you can spin a freewheel onto the outside threads of the old Uniglide cassette freehub body, but I don't understand why you'd want to do this. The axle overhang would be excessive - at least 3 inches on the drive side! Something unique I guess. You could then fit perhaps 4 cogs on the cassette body, and as another 7 cogs on the freewheel. 11-speed system!

Anyone want to mock this up and take a picture?

Jeff Wills

Ummm, like Flying said, you still haven't determined if both are freewheel or cassette. "Cluster" is meaningless in bicycle vernacular.