Bicycle Mechanics - Bottom bracket - removable ring sticks out
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03-18-06, 05:07 AM
Hi. I just had a new FSA ISIS cartridge bottom bracket installed on my bike from a LBS. It has come back with the outer edge of the removable ring sitting about 3 mm out from the face of the bottom bracket. Will this present problems? Does it indicate they have installed the wrong sized cartridge?
Any help would be appreciated.http://i82.photobucket.com/albums/j272/deadlytreddly/DSC02070.jpg
03-18-06, 07:37 AM
Even though there are different widths available, (68mm which you probably have and 70mm) it is unlikely they installed the wrong one because of different thread directions of the right side.
I think they just didn't put it in all the way. I would take it back and ask them about it.
Next time I would do the work yourself. You will do a better job.
If it is tight, it should be alright.
03-18-06, 09:43 AM
Your BB is probably sized to work with 68mm and 73mm width English threaded BB shells.
Many mountain bike BB shells are 73.
As noted previously 70mm shells are typically Italian threaded and wouldn't install properly.
03-19-06, 07:29 AM
I recently replaced my BB when I switched over to Ultegra from the Bontrager system. I found that when you get the sleeve that close to the BB outer edge it gets very hard to screw on. You have to almost force it in a way, what I mean by that it feels like you could almost strip threads but in effect it breaks a little lose and then seats flush to the BB outer edge.
If you had someone at the LBS that put it on that has not done this alot or may be new they may have thought they had it all the way in. Although visual inspection would show that it was not. I would simply take it back to them and ask them.
I assume you use a 68 and that is a 68 that they put on. Is the other side flush?
They installed it in the wrong order. The BB should easiely go all the way in. They should have screwed the BB all the way and then installed the cup. The cup should have the gap not the BB.
03-21-06, 03:42 AM
Well, I just installed one of these tonight on my Eddy Merckx and got the exact same result - a couple of threads worth of the cup sticking out of the BB shell.
I know I installed it correctly - cup in first, snug BB down, torque down cup - so this may be normal for FSA BBs. A buddy of mine had his FSA BB go in with the same results.
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