Mecnic Posted November 22, 2019 Share Hi Guys After many months of trial and error I have managed to successfully dismantle and re assemble ISIS Drive Bottom Brackets. I have managed to find the bearings as well and can source globally, the only issue is the bearings are rather expensive as it is a very odd size. Is there a market for a rebuild as ISIS is getting more and more difficult to find especially odd axle lengths and of course the 83mm shell for that old DH Project. Let me know your thought maybe I will put together a manual on how its done. BogusOne 1 Link to comment Share on other sites More sharing options...
Martin PJ Posted November 22, 2019 Share I did my own Isis rebuild many years ago with some ceramic bearings I bought from Boca Bearings in USA. The rebuild process was something like this. Step 1 - take everything to Cyclesphere.Step 2 - fetch complete bike the next day. It didn't work too well, after a while there was a lot of play in the crank. I think it was the bearing race quality, not so the actual concept, which I believe is sound. Dude Crush, Breezer and Sparky and the Warden 3 Link to comment Share on other sites More sharing options...
Allrounder Posted November 22, 2019 Share Does ISIS bbs come with a little bit of c4 in them, since the ball bearings are there already? Robbie Stewart 1 Link to comment Share on other sites More sharing options...
popcorn_skollie Posted November 22, 2019 Share A standard best left forgotten. Link to comment Share on other sites More sharing options...
droo Posted November 22, 2019 Share A standard best left forgotten. Consigned to the dustbin of history where it belongs. Link to comment Share on other sites More sharing options...
Mecnic Posted November 22, 2019 Share Consigned to the dustbin of history where it belongs. True but sometimes period correct is the only option. Link to comment Share on other sites More sharing options...
droo Posted November 22, 2019 Share True but sometimes period correct is the only option. Also true. Forgot to respond to your original post though - what size is the bearing? I have a few local suppliers of weird sizes, maybe one of them has something. Link to comment Share on other sites More sharing options...
Mecnic Posted November 22, 2019 Share Also true. Forgot to respond to your original post though - what size is the bearing? I have a few local suppliers of weird sizes, maybe one of them has something. Hi the bearing is MR 21531 (ID 21.5mm OD 31.0MM WIDTH 7mm) Link to comment Share on other sites More sharing options...
droo Posted November 22, 2019 Share Hi the bearing is MR 21531 (ID 21.5mm OD 31.0MM WIDTH 7mm) Rush stock them. Retail is about R 150 a bearing. Link to comment Share on other sites More sharing options...
popcorn_skollie Posted November 22, 2019 Share Now I have to see the cranks. Link to comment Share on other sites More sharing options...
Matchstix Posted November 22, 2019 Share Consigned to the dustbin of history where it belongs.Prefered ISIS over the rest of the era's bb. Octolink! Link to comment Share on other sites More sharing options...
BaGearA Posted November 22, 2019 Share I prefer hope external Bb's.... Jus letting you all know Link to comment Share on other sites More sharing options...
Mecnic Posted November 25, 2019 Share Now I have to see the cranks. Its just old truvativ husselfelt cranks, noting special Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now