What's wrong with my brakes??

[cwah]

Hello all,

I've been using these Zoom brakes but they have been so much pain for so long. I think I've wasted so much money on this but I'm reluctant to throw them away as they are quite expensive.
http://www.ebay.co.uk/itm/New-2014-ZOOM-XTECH-Mountain-bike-Hydraulic-Disc-Brakes-160mm-rotors-options-/261294853474?pt=UK_sportsleisure_cycling_bikeparts_SR&var=&hash=item3cd6630d62

I purchased these brake pad but I have to change them every 2 weeks:
http://www.ebay.co.uk/itm/310737972064?_trksid=p2059210.m2749.l2649&var=610209467738&ssPageName=STRK:MEBIDX:IT


Here is what happen to my pads every 2 weeks:

As you can see, it's only wearing on 1 side, and on a small bit!

Once changed, it does work fine... but not for long!!


Here is how it looks:

One of the problem is that the pad tend to move out from the brake... I don't know how to prevent that? And why is it only wearing on 1 side??

 

[Deleted member 4366]

You can't use only a back brake on a relatively heavy fast bike. It's the front one that does all the stopping because all the weight goes on the front wheel under braking. Your back break is totally over-loaded. The only real answer is to change your front forks to ones with a disc mount, and then fit a front disc brake.

 

[awol]

It also looks like your pads are at the edge of the disc which may also explain them being pushed out of place,and could do with the caliper moving in a bit toward the disc centre for more surface area of flat gripping.

 

[Emo Rider]

Two things:
1- It appears that your caliper is not centred correctly or the non wearing pad is not adjusted correctly.

2- As it seems that only a portion of the pad is worn, again, it seems the caliper may not be mounted with the right mount (too high). Or you need to go to a larger diameter rotor.

Hope this helps

 

[cwah]

You can't use only a back brake on a relatively heavy fast bike. It's the front one that does all the stopping because all the weight goes on the front wheel under braking. Your back break is totally over-loaded. The only real answer is to change your front forks to ones with a disc mount, and then fit a front disc brake.

Yeah I need to change that. But it doesn't change the fact that the brake is only getting worn on a small specific side and needs to be updated

 

[cwah]

Two things:
1- It appears that your caliper is not centred correctly or the non wearing pad is not adjusted correctly.

2- As it seems that only a portion of the pad is worn, again, it seems the caliper may not be mounted with the right mount (too high). Or you need to go to a larger diameter rotor.

Hope this helps

Yeah when I put it in place I can't see where I can adjust that

 

[Deleted member 4366]

When you put on new pads, you should be able to spin the wheel. I suspect that you need an extra washer on the axle to move the disc away from the frame so that the caliper can sit in the middle of its adjustment slots. Then, you can get it properly lined up by loosening the two screws and holding the brake on while you tighten them. Without the washer, the disc is always rubbing on one side, which glazes the pad on that side, which makes it ineffective.

 

[cwah]

Thanks, I'll try that. I have so many things I'm missing some of them so I'll do it whenever I have my next brake failure.

 

[john h]

Cwah, check to make both pistons are moving,, also check that the sliding bolt is not bent or chipped that would stop one pad from moving, from your picture it looks like one pad is being prevented from sliding