Disc against pads?

canada16

Hey

Do one side of the disc ever so slightly go against the pad?

I mean like less than a MM.

I have not really noticed any rubbing and they are new, like 4 days new and they are XT's

As the front and back are like this, but on the op side the are well clear of the pad.

If that made any sence.

Thanks guys

jay12

you have to move the calliper so that both pads are pretty much same distance from the rotor. that's what i did anyway and there is no rubbing and the breaks work perfectly

canada16

Back to LBS again, I am starting to get really annoyed.

Will get them to adjust on weekend as I paid RRP and fitting.

Thanks

nicklouse

let them bed in FFS.

canada16

Thats what I thought.

Just being paranoid.

I just dont trust my LBS anymore after what they did to my bike before.

boneyjoe

I've also found this a very irritating and sometimes persistent problem, which seems to get worse as bikes get older and more muck gradually builds up inside the brakes. Especially if you ride a lot during winter or in a wet muddy summer like we've had so far. Some brake types are perhaps a bit more susceptable too. Suggest you learn how to fix it yourself, otherwise could become very irritating... My suggestions:

- take the wheel off, and using a flat-head screwdriver (or other thin/wide/flat tool), push the brake pads apart as far as possible (taking care not to damage them); put the wheel back on, tighten quick release etc, and then pump the brake lever a few times; this should centre the pistons around the brake disc
- if that doesn't work, loosen the bolts holding the brake in place and adjust as needed; you may need to insert some washers in a couple of places to get the spacing right
- if still a problem, you'll probably need help from the LBS to fix it; mine seized up once after a particularly muddy spell, and needed one of the internal seals inside the brake replaced

Hope that helps!

paul.skibum

To be honest we are talking a job of 2-3 minutes per brake with an allen key to adjust the caliper to be centred on the disc. Screw the LBS, it takes longer to go there and argue with them than to do it yourself

canada16

I am not mech inclined.

There are two screws on the outside?

And I just turn and that will adjust the pads?

Yes I know about park tools but that site seems to be for people who know what they are talking about.

Thanks dude

knave

I think it’s unrealistic not to get some degree of rub on new brakes but I had the same thing as you, mine were such that one of the pads barely moved when the pads engaged the rotor and stuff like this does bother me even though I know it probably shouldn’t. I’m not “mech inclined” either and I’m a noob (only about 6 months in) but I managed to realign the calliper in a few minutes. Not sure what the XTs are like but it’s a piece of cake on the Elixirs on my current bike. I’d have a go at it because you may find it easy and then you know it’s fettlable if/when future tweaks are required.

jairaj

paul.skibum wrote:

To be honest we are talking a job of 2-3 minutes per brake with an allen key to adjust the caliper to be centred on the disc. Screw the LBS, it takes longer to go there and argue with them than to do it yourself

+1 its a very quick and simple job to do at home. Read the manual you got with the brakes it explains it all. (if you don't have a manual you can download it from their website)

Skonk

You loosen the bolts on the caliper, once loose (so the caliper moves around if you wiggle it) you pull and hold the brake lever and while keeping the lever pressed in, tighten the bolts back up.

If they are mounted using IS mounts then make sure you DONT slacken off the bolts holding the IS mount onto the frame/forks. The bolts you slacken are the ones that hold the calliper its self onto the IS Mount/Post Mount.

Takes 2 mins to true them both up.

canada16

Ah thanks so much.

Should be easy enough.

Thanks again guys, will give another day or two like nicklouse says.

If still not changed will have a gander.

Need to collect all my old bits, like wheels and brakes and cranks which I will be selling and get all the manuals as well.

Thanks again

Northwind

If you can put up a shelf, you can align brakes. What's the worst that happens? It goes wrong and you have to take it to the LBS anyway.

supersonic

Ah, you not thought about the horrific reaction if brake fluid gets into your hubs? Can cause them to spontaneously combust, melting the whole bike.

I'd be careful canada16

Northwind

What is it you mix with brake fluid to make a bomb again? Chrlorine? So whatever you do, never bleed your brakes in the pool.

canada16

Does that really happen SS?

I have just had another look and they are deffinatly rubbing, just dont see why the LBS cant get it right.

I paid lots of money for the brakes, rrp fthrough them with xtr rotorss.

Will take it back today for them to look at.

canada16

Sorted now,

LBs just loosened the caliper and told me to press the brakes, and they seemed to have lined up.

No more rub, sweet, simples

ramemtbers

when you pull the brakes on look and see if the rotor is being bent. if it s being bent move the pads in more if not its perfect. and if the wheel doesnt spin properly move the pads out. thats basicsly what i do however one of my rotors is bent

canada16

Just been looking and the front one is fine, the front spins and spins and spins.

The back does not, maybe three turns and then it stops.

I am going to have to play around with it some more.

They seemed ok at first now they are back to normal.

They are new brakes with xtr disc, so they cant be bent.

Andy B

nicklouse wrote:

let them bed in FFS.

^ This ^.

If no improvement after a couple of rides, then readjust them.

canada16

Hey

Did it myself, what a feeling better than taking to LBS all the time.

Loosened the rear caliper from the mounts, shifted it over just a mm and done.

None of the rotors are touching and my wheels now spin and spin and spin.

Thanks guys for the advise.

I am just worried I will break something, I like riding, but not that good a fixing, I should teach myself more.