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Right side of the front brake rubs the rim

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Right side of the front brake rubs the rim

Old 04-24-09, 02:44 PM
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Right side of the front brake rubs the rim

So the title says it all. The right side of my front brake is rubbing my rim. I've downloaded a few technical documents on the Shimano Tiagra brakes and found how to adjust the brake shoe.
However, the shoe just doesn't seem perfectly centered. I can screw out the adjustment screw very far, but the right pad keeps rubbing, while the left pad isn't even near touching.

I've already screwed off the front brake and remounted it, but the same things seems to occur again straight away. Am I overlooking something?

Should I entirely relieve the brake tension by unconnecting the brake cable and remount the brake?


I'm doing some work on the bike now anyway, so I thought I'd just make some serious work of this now. A new seatpost (BBB Skyscraper) has been mounted with some Shimano Anti Seize. Tomorrow the stem will be given an anti-squeak treatment with the Anti Seize as people have heard me coming from a mile away for the past weeks

Anyway, some advice on the brakes?
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Old 04-24-09, 05:28 PM
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You should be able to just grab the whole thing and rotate it around the bolt so that the tire is centered between the pads. Don't use the pad adjusters to do it. I suppose it may be possible that you have too long of a cable housing that is pushing the brake off-center.
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Old 04-24-09, 05:30 PM
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Aren't they self centering? Hit the brakes and then when they release they should be centered again.
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Old 04-24-09, 05:50 PM
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Originally Posted by umd View Post
You should be able to just grab the whole thing and rotate it around the bolt so that the tire is centered between the pads. Don't use the pad adjusters to do it.
+1.
Also make sure the axle is fully seated in the dropouts. (Open the QR, press down, and check to see if the wheel is centered in the forks to start).
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Old 04-24-09, 06:00 PM
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Also if the caliper isn't properly tightened the cable can keep pushing the caliper over, causing the right side to rub, seen it happen.
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Old 04-24-09, 06:06 PM
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Originally Posted by Jynx View Post
Aren't they self centering? Hit the brakes and then when they release they should be centered again.
I don't think that would work - dual pivot calipers don't normally self-centre like some disc models. Unless the main (centre) bolt is so loose that the strength of the spring is greater than the friction on that bolt, in which case that's just dangerous.
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Old 04-24-09, 06:11 PM
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Originally Posted by Matt Gaunt View Post
I don't think that would work - dual pivot calipers don't normally self-centre like some disc models. Unless the main (centre) bolt is so loose that the strength of the spring is greater than the friction on that bolt, in which case that's just dangerous.
your right i just checked my bike. I thought they did but nope.
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Old 04-24-09, 06:14 PM
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Originally Posted by Jynx View Post
your right i just checked my bike. I thought they did but nope.
Single pivot brakes like Zero Gravity auto-center. That's why you need a wrench to adjust them if they get off. They are also a lot more sensitive to cable housing length. But with my wife's brakes I've always just grabbed and rotated to adjust.
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Old 04-24-09, 06:36 PM
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if the brakes keep going out of alignment, you need to tighten the bolt harder.

use some loctite and add a star-washer if there isn't one installed already.
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Old 04-24-09, 06:48 PM
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Originally Posted by Jynx View Post
your right i just checked my bike. I thought they did but nope.
I think the bolt on top of the front arm (on the Ultegras anyway) allows fine-tuning of the centre position of the caliper if you go down the loctite route... I'd double check if I were you though.
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Old 04-25-09, 12:02 AM
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Thanks guys, that should be enough info for today

I'll have a look at it later on, as my morning is booked full.
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Old 04-25-09, 05:28 AM
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Originally Posted by Matt Gaunt View Post
I think the bolt on top of the front arm (on the Ultegras anyway) allows fine-tuning of the centre position of the caliper if you go down the loctite route... I'd double check if I were you though.
I mean that they dont self center. I knocked the brake so it rubbed the rim. squeezed the brake and released it. It was still sideways but didnt rub. I had to manually center it and it was fine.
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Old 04-25-09, 05:57 AM
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It's fixed. And none of you were right

Usually the cable of the RD runs along the right of the front brake cable on my bike. Apparently, something caused the RD cable to pop along the front brake cable, and be on the left side. This created too much tension, causing the right side of the brake to rub.

And obviously I noticed while remounting the front brake... For the second time, because I couldn't find anything.
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Old 04-25-09, 06:11 AM
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Originally Posted by FreddyV View Post
It's fixed. And none of you were right

Usually the cable of the RD runs along the right of the front brake cable on my bike. Apparently, something caused the RD cable to pop along the front brake cable, and be on the left side. This created too much tension, causing the right side of the brake to rub.

And obviously I noticed while remounting the front brake... For the second time, because I couldn't find anything.
...which implies you didn't have the mounting nut tightened enough.
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Old 04-25-09, 06:27 AM
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Originally Posted by Psimet2001 View Post
...which implies you didn't have the mounting nut tightened enough.
And you are wrong too. I'm not sure what you're getting to, but the mounting nut was as tight as I could get it without having to worry about anything breaking.

Besides, you've been nagging on me as soon as I showed up on the road cyling forums here. Now cut the crap will you.
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Old 04-25-09, 07:32 AM
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Geez we tried to help you don't have to act like an ass
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Old 04-25-09, 08:01 AM
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Originally Posted by umd View Post
Geez we tried to help you don't have to act like an ass
Don't mind these guys FreddyV...You actually are not the one looking like an ass.
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Old 04-25-09, 08:08 AM
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Originally Posted by unbelievably View Post
Don't mind these guys FreddyV...You actually are not the one looking like an ass.


He asked a question, and all he got were helpful answers. How is "Besides, you've been nagging on me as soon as I showed up on the road cyling forums here. Now cut the crap will you." not acting like an ass?
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Old 04-25-09, 08:12 AM
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Originally Posted by umd
Geez we tried to help you don't have to act like an ass
I'm not acting like an ass. I'm just stating that the road cycling scene is incredibly hard to get into because some people treat you like crap as soon as you start asking questions.
Besides that it's not you I mind.

Originally Posted by unbelievably
Don't mind these guys FreddyV...You actually are not the one looking like an ass.
Maybe I should It took me two times to remount the brake before I noticed nothing was wrong with the gear at all. It were just two cables that flipped by each other.
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Old 04-25-09, 08:18 AM
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Originally Posted by FreddyV View Post
I'm not acting like an ass. I'm just stating that the road cycling scene is incredibly hard to get into because some people treat you like crap as soon as you start asking questions.
Besides that it's not you I mind.
Seriously, there was not one negative comment in this entire thread until yours. If you interpreted Psimet's comment that way then I think you are just being too sensitive. It's responses like yours to people trying to help that make us not want to help in the first place.

Originally Posted by FreddyV View Post
Maybe I should It took me two times to remount the brake before I noticed nothing was wrong with the gear at all. It were just two cables that flipped by each other.
In my reply, the first of the thread, I said that the cable housing may be pushing the brake off center. I wasn't 100% correct about the reason but it's the same idea. The pressure from the other cable was effectively lengthening the brake housing such that it was pushing the brake off center.
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Old 04-25-09, 08:22 AM
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Originally Posted by umd View Post
Seriously, there was not one negative comment in this entire thread until yours. If you interpreted Psimet's comment that way then I think you are just being too sensitive. It's responses like yours to people trying to help that make us not want to help in the first place.
Then I take back what I said. I'm probably just not used to getting spoken to like that. And yes, I might just be too sensitive.

Originally Posted by umd View Post
In my reply, the first of the thread, I said that the cable housing may be pushing the brake off center. I wasn't 100% correct about the reason but it's the same idea. The pressure from the other cable was effectively lengthening the brake housing such that it was pushing the brake off center.
If you look at it like that, you were pretty right. Thanks!
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Old 04-25-09, 08:27 AM
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Originally Posted by FreddyV View Post
Then I take back what I said. I'm probably just not used to getting spoken to like that. And yes, I might just be too sensitive.

If you look at it like that, you were pretty right. Thanks!
You're welcome. "acting like an ass" was admittedly overly harsh. There has been a lot of noise lately about the road forum being too "mean" and this was a thread where everyone was on their best behavior, helpful, and on topic, and all we got in return was flak. So from the perspective of those of us who hang out here for some banter and to try to be helpful, it really discourages us on the helpful part and pushes us more toward the "banter" side.
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Old 04-25-09, 08:38 AM
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I think I can relate to both sides of the story...

Though, sorry for the bad behaviour, Psimet.
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Old 04-25-09, 11:30 AM
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Originally Posted by FreddyV View Post
And you are wrong too. I'm not sure what you're getting to, but the mounting nut was as tight as I could get it without having to worry about anything breaking.

Besides, you've been nagging on me as soon as I showed up on the road cyling forums here. Now cut the crap will you.
Cut some slack man. Without being able to see the bike, all anyone can do is offer ideas.
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Old 04-25-09, 11:42 AM
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Originally Posted by The Carpenter View Post
Cut some slack man. Without being able to see the bike, all anyone can do is offer ideas.
Please read along and don't stop at that post. I've apologized, I was wrong to say what I said.
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