|   Swapping front wheels with Disc Brakes | Baldone
Mar 24, 2003 9:15 AM | | I am wanting to use a seperate set of wheels for road use, and was wondering if I would run into difficulties with my rotor and caliper fitting when swapping wheel sets. This is only an issue for the front wheel as I have V brakes in back.
Do all disc hubs place the rotor in the same spot so I don't have to readjust the brake every time I change the wheel? If the new rotor is the same size 160, I believe, will it matter if it is a different brand? Will 165 work on one wheel and 160 still work on the other?
They are Avid Mech's if that matters. |
| Good news and bad news | Tscheezy
Mar 24, 2003 9:50 AM | | First off, even though there are some "standards" in the business, they are not always adhered to to the 0.5mm. The Bad News: my Hügi 240s and King Discos put the rotor in slightly different positions (about 1mm different). It is enough for the rotor to rub lightly after I swap wheels. I could put some washers behind one rotor to push it outboard to sit in the same spot as the other and make their positions identicle, but I have not bothered because of the good news...
The Good News: they are Avids and have CPS, so recentering the caliper is a very easy operation. A few minutes max, and a zillion times easier than dealing with shims. If you are going to swap wheels often, you may want to do the rotor shim thing which would hopefully be a one time operation.
You cannot mix rotor sizes without adding or subtracting spacers from the CPS mount, or shaving the mount down if there are no extra spacers to remove.
tscheezy |
| Thanks (nm) | Baldone
Mar 24, 2003 10:22 AM | | |
| I have needed only a pad adjustment | shiggy
Mar 24, 2003 11:03 AM | | When I swap front wheels with my Avids, I just needed to move both pads in the same direction a couple of clicks and it worked fine. |
| You............. | Mike T.
Mar 24, 2003 9:55 AM | | ....probably will find a difference between two hubs and experience some disc/pad interference. I even got some rubbing - enough to make me change the caliper setup - when I switched a disc from one make to another.
Of course all hubs (since 2000) have been the same standard but there will be enough variation between makes to give you problems.
But with Avid disc brakes, caliper re-setup and pad adjustment is very easy.
The brands of discs really don't matter as long as the diameters and swept areas are very close.
Why bother changing wheels for road use? I don't even change tires.
Mike T. (mcm # 717, who will be out on the road for two hours today) |
| Did it last night - not easy:-) | El Kabong
Mar 25, 2003 5:42 AM | | I also use Avids, and put on a new front wheel last night. It looked like the disc was centering OK in the caliper, but zinged when I spun the wheel. No problem, thought I -- I've got CPS! I did the quickie approach of loosening the mount, squeezing the brake lever, and tightening. The zinging continued. So I did the full setup, dialed in the pads with the correct 1/3 - 2/3 offset, etc. And still the zinging continued. So I did the setup again, and you guessed it! More zinging. At this point I'm seriously confused, and it's past my bedtime, so I put the original wheel back in and do the setup on it. Zing! I was glad the kids were asleep so I didn't improve their little vocabularies, but I scared the cat, who hunts mice in the basement while I work, with a few choice words. Finally I dropped the wheel back out and looked into the caliper to discover an unoffensive little twig, which must have been in there since the fall.
After removing it, it took about a minute to get the new wheel set up.
El K. |
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