Surly 1x1 and Avid mechanical disc brake issues...- Mtbr.com
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  1. #1
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    Surly 1x1 and Avid mechanical disc brake issues...

    Hey everyone,

    I just built up a Surly 1x1 with some Avid mechanical disc brakes. I'm having trouble getting the rear brake adjusted properly while still being able to pull the rear wheel out of the dropouts. It seems that if I have the axle/QR as close to the end of the dropouts as possible, and using a Surly Tuggnut, there isn't enough room to get the chain at the right tension. Okay, so I remove a link and it puts it right about the middle of the horizontal dropouts. So I adjust the brake (just where it is mounted to the frame, because there is room to move it), and then I find that I cannot pull the wheel out of the dropout if needed - the top of the rotor hits the top of the caliper. I know this is probably hard to understand, since it is hard to explain, but I'm not sure if I'm doing something wrong, or if I'm just kinda screwed into having to adjust the brake position on the disc mounts everytime I want to remove the wheel. I'll send a photo in a few minutes, but if anyone (especially the folks who have a 1x1 with Avids) can shed some light on the problem, it would be greatly appreciated.

    Also, here is info you may need to solve the mystery:

    Hub: Shimano XT disc (XT skewer)
    Cog: Shimano DX 16T, spaced out
    Tensioner: Surly Tuggnut
    Brake: Avid mechanical disc (160mm rotor)
    Chain: SRAM PC-48 8-speed
    Chainring: Salsa 32T

  2. #2
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    That's just what happens.
    Thankfully Avid's are quick to set up and don't need funky shims and stuff.

  3. #3
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    Bonking ... not feelin' well That's how it is

    if you want horizontal drop outs and discs. Most folk here end up needing to adjust the caliper anytime they take out the wheel. If that doesn't work for you, you should look at something with an Eccentric Bottom Bracket, or sliding rear droupouts (such as the Kona Unit)

  4. #4
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    Thanks guys. I don't have a problem loosening two hex bolts everytime I take my rear wheel out.... I had just heard about other people running the same brakes on this frame without any problem, so I wasn't sure if I was doing something wrong or not. I appreciate the replys, thanks again.

  5. #5
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    Quote Originally Posted by pennstatebiker
    Thanks guys. I don't have a problem loosening two hex bolts everytime I take my rear wheel out.... I had just heard about other people running the same brakes on this frame without any problem, so I wasn't sure if I was doing something wrong or not. I appreciate the replys, thanks again.

    the brake mounts are slotted though..you can adjust.. just two quick turns of the wrench.
    or, remove the tuggnut from the non-drive side...unneeded...
    the wife's set up w/ 1x1/Avid works just fine....

  6. #6
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    Here's my setup

    Same deal - Surly 1x1 with Avid Mechanicals. I've only had to remove the rear wheel once, but I was able to pull the wheel out without taking the caliper all the way off.
    Attached Images Attached Images

  7. #7
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    Quote Originally Posted by Padre
    the brake mounts are slotted though..you can adjust.. just two quick turns of the wrench.
    or, remove the tuggnut from the non-drive side...unneeded...
    the wife's set up w/ 1x1/Avid works just fine....

    yeah.... I know the brake mounts have a lot of room for adjustment, but still.... when I have the wheel in there with the chain tensioned and all, and I set up the brakes so that the pads hit the rotor where they are supposed to, there isn't enough clearance (in the caliper) for the rotor (and wheel) to come out. It's kinda difficult to explain, but I'll attach a photo. EIther way, I've just decided to forget about it and just deal with having to reposition the brake each time i take the rear wheel out.

    Earthpig.... what gear ratio are you running on your 1x1? I think that the gear ratio and the type of tensioner are the only two differences between our bikes that would actually make a difference in the brake position
    Attached Images Attached Images

  8. #8
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    Quote Originally Posted by pennstatebiker
    Earthpig.... what gear ratio are you running on your 1x1? I think that the gear ratio and the type of tensioner are the only two differences between our bikes that would actually make a difference in the brake position
    When that picture was taken, it was at 32x20. However, when I get the 1x1 back from the shop tomorrow, it will be 32x18.

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