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All freewheel hubs have the same thread and are compatible with single, 5, 6, 7 and maybe some 8 speed freewheels. Position of the hub is set by dishing of the wheel and spacers on the axle. It's an interesting question. But I think that you should worry more about the rear spacing. 6 speed modern freewheel is not considered to be wide comparing to ones with ...


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I have done the six to eight conversion on an older road bike. By the way I have broken two seven speed rear mountain bike axles. So it does happen. I went with a mountain size (14-32) gear range. I added flat bars and rapid fire shifters. The larger gear range allows me to climb easier than the old 12-25 freewheel did. As @joelmdev stated, I did change the ...


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Before we get into axle breakage, let's discuss your axle spacing, which probably isn't going to work going from a 6spd to an 8spd cassette unless you install a new, longer axle with more spacers, and you'll need to re-dish the wheel slightly. In terms of breakage, I've seen all speeds of freewheel axles break over time. Freewheel hubs' axles are just more ...



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