• Is anybody running Hope RX4 calipers? I've set them up with Apex AXS and they seem to work very well, but I just can't seem to prevent rub.

    The bleeding process was quite easy and I followed Hope's instructions to the letter. It just seems like the (new) pads just aren't far apart enough for the rotor. I made sure that the pistons were pushed in etc during the bleeding process, but still getting a very light rub front and rear. It's not too much of an issue as it really is very light, but still annoying. Do I just need to suck it up until the pads wear a bit?

    One thing I noticed is that the brakes clamp very early in the lever action. Can you bleed brakes too well?

  • embrace the rub

    also when you bled did you use the alu spacers that caliper comes with? IMO they are not wide enough, almost bleed with a screwdriver pushed against them so the pistons are flush inside the caliper

  • It could be that your rotor is slightly out of true, or your frame isn't faced perfectly. I had one frame that was just a tiny bit off which meant the pads weren't parallel to the rotor face and it was impossible to get them running nicely.

  • I had them on my Rival 1 mechanical groupset. There was a small amount of rub but nothing significant. Yes it did go after a short time of wear/bedding in.

    Glad to hear they engage with little lever pull on the nexer AXS levers, I had the opposite on those older, crap Hydro levers. Break performance was stellar though.

  • I have RX4s

    Yeah they rub a bit
    Make sure the rotors are absolutely 100% true

    It’s the trade off for having calipers that could stop a bull elephant

  • Bit late to this and you may already have covered this, but are you using Hope rotors too? The clearance is less than standard and Hope rotors are narrower to account for it.

    Lots knows why, but 🤷‍♂️ reasons.

  • Also late are they IS to thingy mount? I had an adapter that wasn’t square meaning the caliper was at a slight angle to the disc.

  • Spending a bit of time balancing the pistons really helps. Use a flathead behind the pad with more clearance, holding back the pad with less clearance, and pull the lever slightly. You're aiming for both pads to strike simultaneously, and with equal visible clearance. When you get it just right, the rotor "pings" when pads hit. My RX4s don't rub at all.

About

Avatar for keepit @keepit started