Technical & Reference Section > Tech and Restoration

BOTTOM BRACKET HELP IT'S NOT EURO OR AMERICAN!

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steve:
the reason why the bb ismt a standard size, is that it titanium tubeing
note, the smmooth bb i have came with the powerlite i buyed

note the bearings will be imperial, not metric
the spingle is.62 of an inch
15.90mm
-say 16mm
so you need to go 16mm to the id of the cups the bearings need to be as wide as the cups

note, a eurobb wont fit cos ti isnt available that size, or guage to cut a thread in
-us bb size either'

the cup is specufic to a stock size beasring to spindle - else it wouldn't be there - at that size i.d. :LolLolLolLol:

steve:
http://www.midlandbearings.com/6700.htm
the spindle is 5//8ths
15,87mm

steve:
http://www.midlandbearings.com/1600series.htm

probably 5.8ths to 1.3/8ths
#7/16ths widewide

bearing number 1623

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