Tricross fork shudder

dnrdnr
dnrdnr Posts: 27
edited April 2009 in Workshop
Does anyone have experience of this or working solutions?

Comments

  • keef66
    keef66 Posts: 13,123
    It's very common. Google is your friend.

    No advice to give myself though.
  • rhext
    rhext Posts: 1,639
    Yes, I believe it's a standard feature, which they neglect to mention in the marketing for some reason. I changed the brake pads for some generic mountain bike ones and the problem got a lot less severe. But you get used to it after a while - modulating your braking a little stops it (either harder or softer), and I find that emergency stops are thankfully not affected.
  • Jamey
    Jamey Posts: 2,152
    I've got a Tricross Sport Triple 2008 and yes, I get the judder too, same as most Tricross owners, I think. Decent quality brake pads help a bit, Kool Stop Salmon pads are my recommendation but I've tried Swissstop green pads and they're fine too, they just wear faster than the Kool Stops do.
    My photography // My helmet cam videos // My bike
  • Monty Dog
    Monty Dog Posts: 20,614
    I'm just in the process of building-up a cross bike and considered opinion is that it is due to the inherent 'slop' in integrated headsets combined with the flexibility of carbon forks. The best solution appears to be either using mini-vee brakes or relocating the outer cable stop from above the headset to the fork crown. If you have a hole through your fork crown then this could be easy - drilling holes in carbon forks isn't really recommended!
    Make mine an Italian, with Campagnolo on the side..
  • Stuck on a Giant
    Stuck on a Giant Posts: 256
    Any thoughts on whether mini-Vs or cantilever brakes are the cause. I've got mini-Vs on my 2008 Tricross and get squeal from the front brake although I have toed them in.

    I'm planning on changing to cantilevers as the cable pull isn't really right and you have to set the blocks so close to the rims that even 0.5mm out of true is likely to rub. I notice the 2009 models are back to canti's.
  • Jamey
    Jamey Posts: 2,152
    Are you sure they're mini-Vs? I've also got a 2008 Tricross (Sport Triple, pic in sig) and I discovered recently that the brakes are actually full-size V-brakes... I had always thought they were mini-Vs before.
    My photography // My helmet cam videos // My bike
  • comsense
    comsense Posts: 245
    I had that problem (Large Tricross) Clean rims and BBB blocks got rid of it. Every now and again it came back but cleaning the blocks and rims got rid of it.
  • rhext
    rhext Posts: 1,639
    +1 for cleaning the rims. It does seem to help - I actually bought a can of disc-brake cleaner spray and use that occasionally. Amazing how much muck comes off even after you've washed them down.
  • John.T
    John.T Posts: 3,698
    Jamey. Those are mini Vs. The Vs on my singlecross are a lot longer. See the pic in my sig. They reach the top of the fork.
    My Fleet.
  • Jamey
    Jamey Posts: 2,152
    No, they're full-size V-brakes, 100mm in length, I've measured them plus I've replaced the back pair since that photo was taken. I replaced them with Avid Single Digit 5 V-brakes which were the same length as the original arms that came with the bike. Definitely not mini-Vs.
    My photography // My helmet cam videos // My bike
  • Monty Dog
    Monty Dog Posts: 20,614
    FWIW this is common with a lot of carbon cross forks because of the increased length and lack of stiffness - a few people are still running steel forks on cross bikes for this reason. Clean rims / brake toe-in and even caliper adjustment help to minimise the problem. I'll be interested how my new Kuota behaves - I'm running discs on my other 'crosser
    Make mine an Italian, with Campagnolo on the side..
  • Border Cyclist
    Border Cyclist Posts: 1,279
    I just came online to ask this very question! I had wondered whether it was a headset issue. Oh well - at least this saves me from wasting time trying to fix it!
  • dnrdnr
    dnrdnr Posts: 27
    Thanks for the help - toe in has helped immediately - but will need frequent adjustment as the blocks wear. I think I'll see how it goes before trying crown mounted hanger or switching to a mini vee brake.
  • homercles
    homercles Posts: 499
    dnrdnr wrote:
    Thanks for the help - toe in has helped immediately - but will need frequent adjustment as the blocks wear. I think I'll see how it goes before trying crown mounted hanger or switching to a mini vee brake.

    Agree with this - as a recent arrival to the Tricross Singlecross (09), I was staggered at how bad the brake judder was (braking hard from anywhere between 20-0mph!). Toeing the brakes in properly has completely solved it.
    Nail Trail
    Pompino
    CF SLX
  • mattsccm
    mattsccm Posts: 409
    Must admit I ditched the v's on my singlecross because they just look ugly. Had a set of LX cantis in the shed so tried them.Useless with original levers which are meant for v's so used an old set of Dia Compe aero levers. Great and no judder.

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