correct bottom bracket sizing
05-23-07, 02:13 PM
#1
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correct bottom bracket sizing
What's the correct bottom bracket width for this setup?
- Miyata 914 road frame ('91 or so)
- Sugino VP double crankset
I think the current BB may be too wide-- installed a new wheelset last night and the chainline seems way off.
Thanks!
Oh-- I should add that this is essentially a frame-up build, but I figured I could get away with using the previously installed BB. I'll be pulling it tonight to see what size the currently installed bb is.
- Miyata 914 road frame ('91 or so)
- Sugino VP double crankset
I think the current BB may be too wide-- installed a new wheelset last night and the chainline seems way off.
Thanks!
Oh-- I should add that this is essentially a frame-up build, but I figured I could get away with using the previously installed BB. I'll be pulling it tonight to see what size the currently installed bb is.
05-23-07, 08:04 PM
#3
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The crankset determines the BB spindle length.
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05-23-07, 08:21 PM
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Originally Posted by slopvehicle
What's the correct bottom bracket width for this setup?
- Miyata 914 road frame ('91 or so)
- Sugino VP double crankset
I think the current BB may be too wide-- installed a new wheelset last night and the chainline seems way off.
Thanks!
Oh-- I should add that this is essentially a frame-up build, but I figured I could get away with using the previously installed BB. I'll be pulling it tonight to see what size the currently installed bb is.
- Miyata 914 road frame ('91 or so)
- Sugino VP double crankset
I think the current BB may be too wide-- installed a new wheelset last night and the chainline seems way off.
Thanks!
Oh-- I should add that this is essentially a frame-up build, but I figured I could get away with using the previously installed BB. I'll be pulling it tonight to see what size the currently installed bb is.
Measure the chainline as illustrated at https://sheldonbrown.com/chainline on the present BB. Normally, a double should have a 43.5 mm chainline.
If it's off, you can easily calculate how much longer or shorter the next BB needs to be once you have taken appropriate measurements.
Sheldon "Numbers" Brown
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+-------------------------------------------------+ | One measurement is worth 50 expert opinions | | --Howard Sutherland | +-------------------------------------------------+
