Chuck didn't mention one detail on the OMAS BB that is nice feature. The inner seal is left off each bearing and a flexible plastic sleave goes from one bearing to the other to protect the bearings from dirt. The sleave has accordian folds so it can be moved away and grease added to the bearings.
I have used this bearing size to replace the bearings in a shot Campagnolo Record BB. The cups and spindle were machined to accept the bearing and it worked great.
Joe Bender-Zanoni
Great Notch, NJ
> r cielec wrote:
> >
> > Ahoy !
> >
> > I am of the understanding that OMAS offered an alloy cup bottom bracket
requiring a special bearing. I do not know what "special" means although,
they may have been sealed units and of dimensions not standard for bb's.
>
>
>
> The bearings in OMAS's cartridge BB are a standard size "sealed" annular
> bearing and are available from any bearing supply company. I've
> replaced a few in the past and that's where I got them (cheap too, by
> the way).
>
> Special would refer to anything other than the ubiquitous cup and cone
> style bearing, in this case an annular bearing.
>
> http://www.flying-scot.co.uk/
>
> Chuck Schmidt
> South Pasadena, Southern California
>
> .