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- Posts: 394
- Joined: Fri May 21, 2010 11:41 am
About to tackle my first ever hub adjustment!!
My the front hub in my do-everything long-serving Shimano RS-80 wheelset has developed a little bit of play. Can knock it back-&-forth a ittle when normally set up in the forks.
Plenty of youtube videos to help me work out how to do this for a Shimano cup-&-cone bearing. Just wondering if there is anything else I should do while I'm in there? Is there anything else that's relatively simple to do while I am mucking about with the hub?
- Posts: 1953
- Joined: Wed Jul 07, 2010 5:02 pm
- Location: Gippsland Lakes
Nowadays most hubs have crappy, user unfriendly press fit cartridge bearings. Hurray for Shimano sticking with cups, cones and ball bearings.
RS80 front hubs are 3/16” balls.
The rear hubs are 1/4”. You might as well do them too. If the front ones are stuffed chances are the rear ones are too.
They are dirt cheap.
I like RS80 wheels. I had a faithful pair which ran for over 30,000 km’s without fault, or servicing.
Now running on RS81’s. They’re shaping up very well.
I find Shimano tech docs/Dealers Manual is a much better reference source than YouTube or any of the other web sites, other than Park Tools for general info.
- Posts: 135
- Joined: Fri Aug 29, 2014 9:30 pm
- Location: Fremantle, Western Australia
In terms of servicing, the cup and cone overhaul is one of the simplest yet most poorly executed mechanical services. To get a good adjusting you really need an axle vice, quick release compression is a real issue on threaded axles so you want to adjust with a 'tick' of play. Don't use too much grease.... about enough to fill 1/3 of the cup is plenty. A grease gun is your friend.
- Posts: 7039
- Joined: Tue May 21, 2013 8:21 pm
- Location: On The Tools
as the above post suggests, you do need to leave a tiny bit of slack to allow for bearing compression, but if there's too much slop & the wheel is still wobbling when fitted to the bike, the bearings will suffer rapid damage from chattering between the cups and cones.
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