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How many bearings in Ultegra front hub?(6 posts)

How many bearings in Ultegra front hub?angus
Jan 4, 2002 12:59 PM
So I cracked open my Ultegra front hub last night to overhaul it for the first time. I had the proper size replacement bearings ready (3/16", I believe). I got 10 bearings from each side, but when I put the new bearings in, I realized that there was a lot of extra space around the race. You can easily fit an eleventh bearing in there. Has anybody tried this? Any idea why Shimano has the bearings in so loosely? The rear hub (with 1/4" bearings) did not have nearly as much extra space.
Don't add extra bearings!Rusty McNasty
Jan 4, 2002 1:41 PM
If you are sure that 10 was the number it had originally, then 10 is the number that it should have. The load is passed through the bearings to the axle all around the hub, not just at the top, so there is no need to worry about "too much empty space" inside the bearing races. If you add another bearing, they may not all seat on the cones or races properly, and they will rub against each other. Not only will this slow you down, but the hub will quickly self-destruct.
re: How many bearings in Ultegra front hub?liu02bhs
Jan 5, 2002 1:31 PM
Yeah, I have some extra space too. But 10 for front and 9 for rear is usually the standard. So I think you got it right.
re: How many bearings in Ultegra front hub?4bykn
Jan 5, 2002 1:32 PM
An old rule of thumb...T-E-N (anagram for ten-eleven-nine). Front hub gets ten, bb gets eleven, and rear hub nine.
big up to brooklynsecourir
Jan 6, 2002 3:06 AM
that is by far the most insightfull peice of advice i have seen in this forum for a long while. keep it comming.

respect you (from someone at the other end of the 3 train).
Dura Ace nine speed BB has a lot morePaul
Jan 7, 2002 10:42 AM
I took my Dura Ace BB apart, and found that it had roller bearings and ball bearings. Don't remember the exact count, but it was like around 50 or more.