Technical & Reference Section > Tech and Restoration

Does anyone know the axel size of a redline proline crank

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darkersomeday:
have a look at the 400 series in ratty's thread, i'm fairly sure theyre 20mm,

if you need a spare i've got one here if its any good,

BMXBEN:
Cheers lads the bearing casings have been fitted with a hammer & there shot to bits & one of the bearings is crap too. I put an engineers ruler across the centre hole & it says 21mm. they are redline prolines i got off motomag :-\

MartyC:
Ben, I had a similar problem with one of my BB's, I got my mate to put them on a lathe and skim the outer surface then I wnet to work with wet and dry before polishing them - the outers look like new now although the insides are not so pretty but no-one sees those when they are on.

BTW, on your bearings is there a very thin top-hat style washer pressed in?

BMXBEN:

--- Quote from: MartyC on June 17, 2007, 11:06 AM ---Ben, I had a similar problem with one of my BB's, I got my mate to put them on a lathe and skim the outer surface then I wnet to work with wet and dry before polishing them - the outers look like new now although the insides are not so pretty but no-one sees those when they are on.

BTW, on your bearings is there a very thin top-hat style washer pressed in?

--- End quote ---

Hi cant see any top hat washer pressed in although im not entirley sure what your on about. i could probably get away with new bearing cups but again i dont know what size one's to get :-\

theRuler:
they are 20's

i have some 20mm bearings for euro cups (no cups though) that will fit them, if you are gonna run a euro BB

alans sells 20mm bearings that allow you to use them in a spanish bb

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