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Can't wrap my head around BB spindle lengths. And should I even care?

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Can't wrap my head around BB spindle lengths. And should I even care?

Old 12-06-22, 03:00 PM
Join Date: Oct 2022
Location: UK, New Forest
Posts: 49

Bikes: 1980 Gitane sprint and the start of Motobécane!

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Well. I managed to get some time with the Motobécane bottom bracket. It appears to be English/ISO thread on the bottom bracket cups, but Swiss thread bottom bracket. They came with the frame and I assumed (never assume-it makes an ass out of u and me....) they were the cups. Yes ISO threads will go on but tighten and stop. No damage from what I can see but thought I might as well run my Swiss bottom bracket taps in the thread to clean them up. However, my Var 42b inserts from one side but stops short as Motobécane kindly left a step inside so the guiding part will not link with the tap part.....oh the joy, now I will just go and find some Swiss bearing cups....how hard can that be? I will go cartridge if it proves impossible. All this on the day my car went for its annual fitness test (MOT in the UK) and decided to cost me £300+ in paper tokens, lol, I think this is going to be a long day....
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