Hokay…I picked up a set of disc brakes today. Everything is looking good. My pieces are nice.
B/c I'm so new to this, I have to ask: Why doesn't my rotor fit into my hub properly?
I got shimano m525s.
Hokay…I picked up a set of disc brakes today. Everything is looking good. My pieces are nice.
B/c I'm so new to this, I have to ask: Why doesn't my rotor fit into my hub properly?
I got shimano m525s.
What do you mean?
You have disc hubs, right? are they 5 bolt?
Or are you talking about the caliper?
During the Middle Ages, probably one of the biggest mistakes was not putting on your armor because you were 'just going down to the corner'.
- Deep Thoughts by Jack Handey
OH, I should clarify…
I have disc hubs. There are 6 bolts in the hub. THe rotor has 6 bolts. to use. The bolt spacing is the same for hub and rotor.
BUT what's weird is the little inside wavy part of the rotor where the bolts are next to, they are a different pattern than the hub's wavy pattern. So I can't fit the rotor into the hub perfectly because the wavy bits aren't aligned. (And this is only for the front hub…a qr20 hub)
Um… the rotor bolts to the face of the hub. It doesn't fit into the hub. It goes on the face of the hub.
The waves won't match up.
I like my women like I like my Scotch. 15 years old and mixed up with coke.
So the wavy bit in the centre shouldn't matter at all? I'm not talking about the outside, the inside part, the radius is different and the rotor doesn't go seem to fit…like one of those block puzzles that 1 year olds play with, they jsut don't fit.
maybe I'm just really daft.
not relly.. the bolt patterns should match up.. do you have a camera ? take some pics..
im amazed I havent gone to jail for satatory rape or kidnapping
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woah.. beat me too it :O
im amazed I havent gone to jail for satatory rape or kidnapping
Good prices, amazing hosting
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Say Ryan sent you.
not really :S can you take a pic? the rotor just bolts on top of the hub, i dont think it has to match up. as long as you have 6 holes to 6 holes (rotor to hub) then you should be fine
dont bother matching up the wavy part, it doesn't matter
Originally posted by Lady Gravity
dont bother matching up the wavy part, it doesn't matter
Okay, but the rotor kinda rubs on my post mount adapter (but fits in the caliper fine)
(BTW, I'm usually out on friday nights, but tonight is tax night and this is procrastination)
aslong as the bolts match up your ok..
im amazed I havent gone to jail for satatory rape or kidnapping
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Yea, you SHOULD have about a mm of clearance on the post mounts. No worries.
The waves aren't supposed to match up, by the way. They are designed to be opposed. If they matched up, there would be no where for the bolts to go. Also, to save weight over a solid mount.
I like my women like I like my Scotch. 15 years old and mixed up with coke.
Oysterboyz,
It sounds to me like you have one of the older marzocchi QR-20 hubs. These were designed to match up with the inner pattern of hayes rotors and provide a more solid base for mounting than the bolts alone. Other manufacturers didn't use the same inner geometry on their rotors so this system was soon dropped in the name of compatibility (plus 6 steel rotor bolts are more than strong enough for the load).
So…
to make your rotor interface properly on that hub you need to file it's inner diameter to match the "waves" on your hub. Then it will fit on the whole way and you'll be in the clear. As you've seen just bolting it on over top will place the rotor too far out and cause interfered (in your case the rotor is hitting the adapter, but they're can also be contact between the rotor bolts and the fork leg depending on the fork and bolts)
Bac,
He's talking about "waves" within the bolt circle, not the "waves" on which rotor bolts holes are usually place (ie. shimano XT hub)
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