TRP Spyre break pads uneven wear

zefs
zefs Posts: 484
edited December 2017 in Workshop
Any idea why this issue is caused on my brake pads? It happens only on the back caliper, TRP Spyre despite the calipers being aligned correctly with the rotor. I think that it's caused because of the pads are not perfectly level but on an angle as shown in the first picture (link below), is there a way to level the calipers?

https://imgur.com/a/q2QRJ

On this video they mention that the mounting tabs need facing in case of such issue, which requires a special tool:
https://www.youtube.com/watch?v=1T2RLgQoyvs

Are these mounting tabs the ones found on the bike frame itself?

Comments

  • ugo.santalucia
    ugo.santalucia Posts: 28,242
    Over the years, I have never managed to get "even wear". Your images are on the upper end of what I would consider acceptable, typically mine were worse. There are a million reasons why pads wear is uneven, probably the most obvious is that you are wearing through something which is less than 2 mm thick, so any unevenness looks gigantic, when in fact it is a couple of tenths of a millimeter and you would not even notice it on a rim rubber pad.

    If it is of any comfort, a short lowdown of my mechanical disc caliper woes is reported here

    https://whosatthewheel.com/2017/05/05/m ... -a-review/
    left the forum March 2023
  • zefs
    zefs Posts: 484
    I don't expect them to wear 100% evenly but as you can see on the images they get squeezed in the corners for some reason, only happens on the back caliper. I will take it to the shop as it has to be the metal plate facing issue (the plate were the calipers mount on).
  • timothyw
    timothyw Posts: 2,482
    #1stworldproblems.....

    Seriously, not worth worrying about. Brake pads are cheap. They still last ages even with this unevenness. Unless your braking is affected this small stuff is not worth your time.

    As an aside, this is why the Avid brakes have conical washers, to allow them to align perfectly with the rotor.
  • zefs
    zefs Posts: 484
    It seems to be affecting the braking yes, since the pads don't sit well on the rotor under breaking. These pads cost 20€ per caliper :?
  • timothyw
    timothyw Posts: 2,482
    These are what I've used on mine recently, much cheaper (and just one of many options!)
    http://www.chainreactioncycles.com/clar ... -prod55871

    Still, since the bike is presumably new you have nothing to lose by trying to get the mount faced or otherwise aligned by the shop.
  • cycleclinic
    cycleclinic Posts: 6,865
    Buy cheaper pads. Ebc organic are very effective.
    http://www.thecycleclinic.co.uk -wheel building and other stuff.
  • zefs
    zefs Posts: 484
    I had the Shimano B01S resin ones (6€) and wasn't happy with the performance, there was no bite in braking, only drag. Combined with the mechanical trp spyres well the braking is worse than rim brakes. That's why I am trying the more expensive brake pads as well as compressionless cable housing.
  • tsarouxaz
    tsarouxaz Posts: 70
    there is only one solution: take a nice mat or towel with a single color, take both calipers of the bike, clean them, put them on the mat, take a photo of them and SELL THEM AWAY FROM YOU!!. and then get your self a set of HY/RDs from the same company, a set of compressionless cables and you will then have a brake system on your bike. I had both spyres and bb7 and other crap mechanical calipers, only the hyrd was close to full hydraulic.
  • zefs
    zefs Posts: 484
    Actually the issue was probably caused by trying to add the wheel back on as the mechanic suggested (the rotor probably cut the pads because of the force). The HY/RD's seem like a good idea though as they don't require new levers, thanks for the suggestion. Do they work with 10 speed shifters though (they mention 11 speed in their site).
  • timothyw
    timothyw Posts: 2,482
    I'd suggest taking a look at the Giant Conduct system before buying HyRds. Better value and in theory a better approach to the problem (although availability is a bit of an issue right now....)

    Although you should perhaps hold on until I've finished fettling my new set and have had a chance to actually review them...
  • zefs
    zefs Posts: 484
    TimothyW wrote:
    I'd suggest taking a look at the Giant Conduct system before buying HyRds. Better value and in theory a better approach to the problem (although availability is a bit of an issue right now....)

    Although you should perhaps hold on until I've finished fettling my new set and have had a chance to actually review them...

    Isn't that full hydraulic? I'd probably prefer to not have to deal with oils and bedding in the system.
    Feel free to send me a pm when you do review them, thanks!

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