MegaSack DRAW - This year's winner is user - rgwb
We will be in touch
Just wondering about fitting a BB-mount chain-device type thing (the sort that replaces a spacer) to a bike which presently has square-taper cranks on it.
Need to check the measurements, but say it has 68mm shell. Is there any reason not to fit a BB with 73mm shell, a 2.5mm BB spacer on the non-drive side, and a BB-mount chain device on the drive-side?
it'll push the chainline out by 2.5mm.
that's the point of putting the spacer on the non-drive side too and using the 5mm longer shell.
I fitted a std 73mm BB to my Soul with a BB mounted chain guide.
I did look for a BB with a fairly decent cup insertion just to be sure though.
No issues with running it though.
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I found it mad no noticeable difference to shifting.
Grated it mush have been "out" by 2.5mm ish but I didn't have any problems.
letmetalktomark - perfect. Thanks.
Just have to hope I can fit a longer shell to my old Cindercone...
Just have to hope I can fit a longer shell to my old Cindercone...
eh?
I meant deeper cups on the BB.
Think I went with an UN91
[i]that's the point of putting the spacer on the non-drive side too and using the 5mm longer shell. [/i]
sorry, I thought the point was to fit the BB mounted guide - the chainline change is a side effect of that which you hadn't acknowledged in your post so I thought I'd mention it as a response to 'Is there any reason not to'.
wwaswas - no it wont as he is theoretically spacing everything to keep the axle central, so chainline will be unaffected.
The non-drive side cup doesn't butt-up against the frame, it butts up against the bb shell, so you don't need to bother with a spacer on the nds - the cup will just thread further into the frame.
wwaswas, I see...
I've got hold of a WI double freewheel, so thought something like a Yess ETR-B would work to allow my to manually switch gears.
cp - good point. So I might just need a longer axle, to compensate for changing the q-factor.