The code will be MR 21531 (21.5 x31 x 7)
Back now - Sorry I had to rush off.
Ah yes I can see now that it is MR 21531. The bill for the three bearings and postage was for £23 in April 2007, so probably about £7 each. I remember now putting two of them on the Drive Side to replace the 14mm width bearing in the picture above.
I've found some bearings MR2231 (ukbikestore) but at £20 each I'll leave be given I probably need some other parts it's just not worth it. I'll see what I can bodge up with the current 3804's in there as even the 3804's are a small fortune for some bearings
As they are RF specific and the Signature series instructions say they might have a grease port
Have to try get them out of the cups and off the axle at some point
MR2231http://www.ukbikestore.co.uk/product/16 ... aring.html
been fun looking though... makes me want to find a cheap fix all the more though
Well done for finding them, even if you end up sorting things another way - every day's a learning day
As for ISIS in general, you made a good point earlier regarding how long it was around for!
The actual balls in the bearing are tiny little things compared to Square Taper. I ended up buying a ludicrously expensive Stronglight Twister Titanium for that Kula Primo of mine.... with a view to it lasting longer.
Seems ok so far - oops, that'll be a bad omen!
1989: Kona Cinder Cone | 1993: Kona Kilauea | 1996: Kona Ku | 1997: Kona King Kahuna Stars ‘n’ Bars 18” Vs - Kona King Kahuna 19” Disc - Kona Explosif - Kona Koa | 1998: Kona Hei Hei - Kona Ku - Kona Hot | 2000: Kona Explosif | 2003: Kona Kula Primo | 2007: Scapin Kyoto | 2010: Kona Kilauea.