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Old 10-26-06, 03:58 PM   #1
fadetoblack6902 
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bearings in a 105 hub

I recently acquired a 2001 GT zr3000 road bike which had a sticky 105 front hub. it was smooth fot 3/4 of the revolution, and barely moved in the other quarter. I pulled the hub apart suspecting a bent axle, but it is totally straight. The cones, races, and bearings all appear to be in good condition. One side had nine bearings, the other had 10. Most newer wheels i have found to have 10 per side. I went ahead and added the extra bearing to the side with 9, cleaned it up real good and put it back together only to find that it is now worse than it was before. Same problem, but it also has some bearing pop sometimes. are 105 hubs supposed to have 9 per side? if not, any other ideas?

thanks in advance
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Old 10-26-06, 04:05 PM   #2
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If equalizing the number of bearings at 10 made it worse, why don't you try equalizing the number of baarings at 9 to see if that makes it better?
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Old 10-26-06, 04:52 PM   #3
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I just had a look at the Shimano website because something wasn't ringing true. Front hubs use 11 x 3/16 " bearings per side and rear hubs use 9 x 1/4 " bearings per side.

Regards, Anthony
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Old 10-26-06, 04:54 PM   #4
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I just had a look at the Shimano website because something wasn't ringing true. Front hubs use 11 x 3/16 " bearings per side and rear hubs use 9 x 1/4 " bearings per side.

Regards, Anthony
11? ten seemed pretty tight, I dont even know if I could fit 11 per side. is this for all 105 hubs?
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Old 10-26-06, 04:57 PM   #5
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also, where on shimano's website did it say how many and what size bearings? I can't find it.
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Old 10-26-06, 05:07 PM   #6
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Maybe the problem is that someone has fitted the wrong sized bearings.

If you go to the products page, 105, hubs and then exploded view you will get a PDF with the information. Mindyou 11 x 3/16 front and 9 x 1/4 rear is standard for Shimano.

Regards, Anthony
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Old 10-26-06, 06:44 PM   #7
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Sounds to me like someone installed fewer of a bigger bearing. Start over with the right stuff!
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Old 10-26-06, 07:22 PM   #8
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Older 105 & other Shimano front hubs take 10 bearings per side 3/16th size. Shimano's site has tech docs for 07 newer generation hubs. Check that the metal dust cap is not bent or shifted out of place.
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Old 10-26-06, 09:19 PM   #9
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one of the dust caps inner lips are bent slightly. I guess i'll replace that and get new bearings. thanks guys
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Old 10-26-06, 09:31 PM   #10
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one of the dust caps inner lips are bent slightly. I guess i'll replace that and get new bearings. thanks guys
I've also read that when replacing bearing balls, you need to use balls from the same batch, as different batches may be different in actual diameter. This might account for the popping you experienced after adding an odd ball. On the other hand, maybe the difference is so slight it only matters over the long haul.
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Old 10-26-06, 09:36 PM   #11
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I've also read that when replacing bearing balls, you need to use balls from the same batch, as different batches may be different in actual diameter. This might account for the popping you experienced after adding an odd ball. On the other hand, maybe the difference is so slight it only matters over the long haul.
This is true. Using a mixture of old and new balls -- properly cleaned, greased, and adjusted -- will give you a hub that is not as smooth as a hub with all-new bearings. Normally you can get it pretty decent... it just won't be floating-on-air smooth like brand new balls from the same batch will give you.
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Old 10-27-06, 05:30 AM   #12
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Originally Posted by AnthonyG
I just had a look at the Shimano website because something wasn't ringing true. Front hubs use 11 x 3/16 " bearings per side and rear hubs use 9 x 1/4 " bearings per side.

Regards, Anthony
The only Shimano front hubs that uses 11 x 3/16" balls per side I've ever seen are Dura Ace. All of the others use 10 x 3/16" balls.
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Old 10-27-06, 06:00 AM   #13
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On a Shimano Hub it has always been industry standards to have 10 3/16" bearing on each side.

1.) roll a stripped down axle across a plate of glass and really check if it's bent
2.) replace with ALL New bearings. {assume some are no longer round being they have been riding so long with 1 missing...**
3.) Inspect the actual bearing race/cup in the hub and that the wear mark is even all the way around. NOTE: if this is bad!!! Best to replace the complete hub and have one relaced into it...
4.) Last MUST BE THE CORRECT CONES? this will throw off any setting due to the curve in the actual cone.

Suggest: Best to Locate a used Hub or New. Price on a complete hub is cheaper then buying all new parts. except of course bearings.
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