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Bearing size for a Quando hub

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Bearing size for a Quando hub

Old 07-11-18, 07:51 PM
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brian3069 
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Bearing size for a Quando hub

I Tried to service a rear Quando hub today. Went to reinstall the bearing and realized they are two different sizes, nine 1/4" and ten 7/32" balls. Two different size bearings in the same hub is crazy, right? Nine 1/4" balls is really tight fit leaving no gap. So, it's either eight 1/4", or ten 7/32".
Any Idea, thanks.
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Old 07-11-18, 08:41 PM
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I once had a quando hub and used 1/4". Maybe i only measured one side and assumed both are the same?
they are crappy haubs anyway, so just use what works.

BTW, i had to replace a cone and of course couldn't find one, LBS was no help. i just measured what was needed and got a cone from Wheelsmfg. Overall wasn't worth it the cost.
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Old 07-12-18, 01:43 PM
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Lots of Quandos here. Not nearly as bad as they are cheap.

99% of the front ones use 4,762 mm (3/16″) 2 times 10 at each side, while 99% of the rear ones use 6,35 mm (1/4″) 2 times 9.
Setting preload perfectly is a bit trickier than with Shimano - some just can't be adjusted to turn smoothly, but without play. Go for the preload that just eliminates play and they'll work fine and last pretty long.
7/32 for a rear hub is strange.
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Old 07-12-18, 06:44 PM
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After playing with some more, I'm convinced it was made to use two different size bearings. Nine 1/4" balls will fit in the non-drive side, but not on the freehub side. The 7/32" don't work at all on non-drive side. The cones are a different diameter. It feels smooth as any mid-line Shimano hub I've ever worked on, but what an odd set up.
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Old 07-12-18, 11:51 PM
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I have seen this before as well, when a customer came into the shop with their fixed gear wheel, it was a Quando branded rear, fixed/free flip-flop hub. From factory it had 10 x 7/332" bearings on either side. Luckily for us, we didn't make any assumptions and measured.
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Old 12-15-18, 11:05 AM
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Digging up an old thread, I know, but I just ran into a very similar problem overhauling an old Quando hub. 9 x 1/4" drive side, 10 x 7/32" non-drive. Even stranger is that the 1/4" bearings are quite tight and the 7/32" bearings leave a nearly bearing-sized gap. It makes me wonder if I mixed up my notes when disassembling.
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Old 01-08-19, 10:01 AM
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Originally Posted by bigred90 View Post
Digging up an old thread, I know, but I just ran into a very similar problem overhauling an old Quando hub. 9 x 1/4" drive side, 10 x 7/32" non-drive. Even stranger is that the 1/4" bearings are quite tight and the 7/32" bearings leave a nearly bearing-sized gap. It makes me wonder if I mixed up my notes when disassembling.
Not uncommon for rear hubs to have different size balls either side. Usually odd number, there should be a gap of less than one ball in each cup - do not force another one in. In the bad old days in my shop we would pack a bearing with ball and polishing compound instead f grease and attach a drill to the axle and spin it until the bearing rotated smoothly - could get them almost as buttery smooth as a Campagnolo!
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Old 01-08-19, 09:02 PM
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Originally Posted by Got bikes View Post
Not uncommon for rear hubs to have different size balls either side. Usually odd number, there should be a gap of less than one ball in each cup - do not force another one in. In the bad old days in my shop we would pack a bearing with ball and polishing compound instead f grease and attach a drill to the axle and spin it until the bearing rotated smoothly - could get them almost as buttery smooth as a Campagnolo!
Thanks for the info! The 1/4" bearings definitely seemed too tight so I could try leaving one out.

The Quando hub I referred to actually seized up on a ride and left me stranded. I've tried several times to repack the bearings but simply can't get them to rotate smoothly and the axle is sometimes impossible to turn by hand. I suspect the balls may not be seating properly on assembly and some of them are finding their way out of the race altogether. It's an old wheel, so I've given up on it for now (possibly forever).
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