Adding disc mounts to a 120mm frame

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M_V in reply to @bfst

Surely chainline would be fine as its a thread on freewheel on a regular threaded hub?

The issue is that disc line ≠ chain line no?

I know the 135mm trials hub (freewheel thread one side, 6 bolt the other) I had gave a much wider chainline on the 6 bolt side than on the threaded side.

So what at first seemed like a simple job of flipping the wheel and swapping the rotor for a cog actually ended up as a total pain in the arse job involving shimming the chainring out.

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bfst in reply to @M_V
I think on a 120mm hub disc line does equal chainline, because the hubs pictured above are designed for fixed / fixed use, with a 6-bolt cog (pictured).

They aren't designed to be used with a disc rotor but I don't see why it wouldn't work, to allow a 120mm frame to run disc brakes.

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M_V in reply to @bfst

It’ll still put something in the wrong place, at least if it’s the rotor and it’s too far inboard then it should be easy enough to work around it

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