Technical & Reference Section > Tech and Restoration

redline flight help please

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crusty:
i have flights with sealed bottom bracket the spindle seems a bit loose in the hole is this normal or should it be a tight fit i would imaging the later but would like advise asap as i'm trying to build bike today
thanks to anyone that can help

harris:
yes they should be a shoulder fit nice and tight not over tight thou.if they are loose they will damage the bearing .

Bren Gunn:
The bearing you are using needs a very fine top hat shim to make the internal size smaller. I think the spindle is 19mm and the bearing 3/4" ... could be the otherway around :-\

zed4130:
Ask ratty he should no i traded some flights recently not my thing 1pc forever less complicated basically simple like me :idiot2:

steve:
you might have 20mm bearings
they come in some other brand cranksets

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