How to move my crank away from the bottom bracket?
06-24-14, 08:51 PM
#1
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How to move my crank away from the bottom bracket?
I have a square taper BB in a Mtn bike frame.
Crank I have is like a 46t.
It is too close to the frame. The teeth rub up against the frame.
How do I space it out?
Crank I have is like a 46t.
It is too close to the frame. The teeth rub up against the frame.
How do I space it out?
06-24-14, 08:59 PM
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this, or google "bottom bracket spacer". of course it will shorten the other side.
06-24-14, 08:59 PM
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You need a longer spindle on the bottom bracket. Square taper bottom brackets are cheap so it shouldn't break the bank.
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Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
06-24-14, 09:22 PM
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06-26-14, 08:03 PM
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As an additional option you can also shim it out a very small amount with paper thin metal shim stock bent to cover two sides of the spindle. At the very shallow angle it has insignificant impact on concentric but can push outward the crank by a sixteenth or two. You cannot shim it nearly as much as changing spindle though. Our tandem crank was shimmed his way and we did not even know it until we took it apart for maintenance. We assembled initially without the shim and derailleur was out of adjustment. We reassembled with the shim and it was in tune again. I'd say the shim moved it out about 3/32 but that is just a guess as we never measured
Last edited by dwmckee; 07-08-14 at 09:17 PM.
06-28-14, 06:04 AM
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Also the number of teeth of your big chain wheel, can make it tough to get the crankset close to the frame. With some MTB frames, the chainstays really flare outward. Don't forget to adjust the front derailer when done. Chris
