Disk brakes

[martint235]

So I'm being thick. Fitted new pads but when I put the wheel back in the disk is too far to the outside of the bike and I'm struggling to stop it rubbing. I have the QR lever on the disk side of the wheel. Because of the mudguard I can't turn the QR to tighten or loosen on the bike, I can only open and close it.

So I'm having a mental block, to effectively move the disk towards the inside of the fork, do I loosen the QR and tighten the other side before fitting or vice versa

 

[Kajjal]

You can just loosen the calliper bolts, realign by eye and tighten back up carefully. If hydraulic with the pads in very gently push the pads apart with a largish flat screw driver and if a piston is stuck or out of position this will sort it but be gentle.

 

[Tim Hall]

Moving the QR lever won't have any effect on the position of the disc.

 

[martint235]

Moving the QR lever won't have any effect on the position of the disc.

Doesn't it move the disc by how the axle fits into the drop out? Or that's what I'm thinking. I have having one of those brain meltdowns over it though.

 

[T.M.H.N.E.T]

New pads with more meat on them will need the caliper aligned

 

[Yellow Saddle]

Both pads float and by fiddling with the one more than the other you can change the offset of the gap. Usually this self-corrects but if the pistons are sticky, this doesn't happen. Look up how to clean and lubricate them and then try again.

 

[gasinayr]

Loosen caliper bolts, pull brake lever a few times then tighten the caliper bolts with the lever pulled up hard. Caliper should be centered.

 

[martint235]

No, the wheel should be seated with its axle in the dropouts evenly.
What brake is it?

They are BB7s.

Both calipers are fully loosened yet when I put the wheel in, the disk is rubbing against the outer pad.

When I get home, I will draw a pretty picture on my snazzy iPad with Pencil to show what I mean (I've got to do something to make it worth the money)

 

[martint235]

Right, in that case


Re tighten the alignment bolts with brake held on

Ok thanks all. Will give that a go when I get home.

I'm still going to draw a picture though.

 

[martint235]

In coloured crayon I hope.

I think one of the apps allows me to do coloured crayon, yes.

 

[ianrauk]

Ok thanks all. Will give that a go when I get home.

I'm still going to draw a picture though.

You will need a Torx 25 screwdriver/allen key to undo the bolts.

 

[martint235]

You will need a Torx 25 screwdriver/allen key to undo the bolts.

Fairly sure I've got one of those. I've got 3 different sizes of Torx.

 

[ianrauk]

Fairly sure I've got one of those. I've got 3 different sizes of Torx.

It's pretty easy to do once you got the hang of it.

 

[Jody]

I find disc brakes easier to align first time by eye, checking daylight through both pads.

 

[martint235]

So I promised a sketch. Done in a kind of crayon as requested by @User

So if you imagine the QR is left and turned anti clockwise and the nut thingy at the right is turned clockwise, doesn't this shift the axle right relative to how it fits in the dropouts

Edit: yes I know the right hand arrow is also going anti clockwise but I couldn't be a***do to draw it again