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  1. #1
    Senior Member macnab's Avatar
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    Mechanic help - chain length / caliper rub issue (pics)

    I put together my daughter's birthday bike last night. Having trouble getting the 28 rando to fit, due to the chain length. I removed two links, and now I am caught between a too-tight chain on one hand and tire-to-brake caliper rub on the other . If the chain is a pretty basic KMC Z-410:

    - Is it safe toput one of the links back in, i.e. pins not damaged by removal?
    Wouldnt that push the axle off the back?

    - Should I move to a half-link chain? (see pics of where axle is in the dropouts right now) Moving half link distance might be much better than a whole link. Reason I took two links out in the first place is that it looked like the wheel would be pretty far back in the dropouts if I didn't. Do you think I can out a whole link back in?

    Alternate ideas? File the brake arms? Get a different (low-cost) brake with better clearance?



    That's where the axle sits right now.



    Tire spins right now, but there's no room for a pebble.


    Thanks for any help!

  2. #2
    Senior Member docboyd's Avatar
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    I'm pretty sure you can put a link back in...as long as its not busted or anything

  3. #3
    GONE~
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    The cheapest solution would be a half link, which is about $3 or so at your LBS.

  4. #4
    Team Beer Cynikal's Avatar
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    If you put a link back in the axle would sit too far back in the track end. You ave 3 options: smaller tire, different gearing or a half link.
    I'm not one for fawning over bicycles, but I do believe that our bikes communicate with us, and what this bike is saying is, "You're an idiot." BikeSnobNYC

  5. #5
    Goes to 11. striknein's Avatar
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    Half link++.

  6. #6
    Senior Member macnab's Avatar
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    I didn't know I could buy a half link by itself. Thanks!

  7. #7
    coasterbrakelockup lz4005's Avatar
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    Smaller tire or brake with better clearance.
    Ride lots, have fun, skid often!

  8. #8
    Senior Member macnab's Avatar
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    Brake suggestion?

  9. #9
    Constant tinkerer FastJake's Avatar
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    Cheapest: adding a half link.

    Middle: A single pivot sidepull will give better clearance than a dual pivot. With a single pivot the tire will hit the brake at almost the same time it hits the seat stay bridge.

    Most expensive but best (IMO): a frame with more tire clearance or horizontal dropouts instead of track ends.
    Why "derailer" is the correct way to spell the gear-change mechanism: sheldonbrown.com/derailer.html

  10. #10
    Old fart JohnDThompson's Avatar
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    Quote Originally Posted by macnab View Post
    Alternate ideas? File the brake arms? Get a different (low-cost) brake with better clearance?



    Tire spins right now, but there's no room for a pebble.


    Thanks for any help!
    Lower profile tire?

    How wide is the present tire?

  11. #11
    Senior Member macnab's Avatar
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    The tires are 28 Randos. Thinner tires are ruled out as an option, as the kid has skinny tire phobia. We ride dirt trails now and then in the park.

    I also can't buy a different frame at this time. $$$

    Thanks for all suggestions though, I appreciate the input, even when I can't use it for some reason or another. I bought the half link and will test it out when I get back in the garage at the end of this week.

    Edit: Just ordered a single-pivot caliper brake. That plus the half link should resolve the issue for now.
    Last edited by macnab; 03-22-11 at 04:50 PM.

  12. #12
    %#&*#%>?% Build your own's Avatar
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    I see you ordered another brake, but for future reference,filing it a mm is not going to cause fail.I've done it to the brake and forkcrown to fit 28s on one of my bikes and never had a problem.Also,if it spins freely you're good to go.

  13. #13
    Veteran Bastard Scrodzilla's Avatar
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    macnab - what frame is that? I want to see a pic of the whole bike!

  14. #14
    GONE~
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    Looks like Maxway dropouts, but not stamped.

  15. #15
    Veteran Bastard Scrodzilla's Avatar
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    Close but no cigar:




  16. #16
    i smell bacon yummygooey's Avatar
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    Looks like a Swobo Sanchez/I remember a thread about them recently.
    // yummygooey

  17. #17
    Veteran Bastard Scrodzilla's Avatar
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    I think you're right!

  18. #18
    Senior Member macnab's Avatar
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    I am not done with it yet. Doing some work-work in Kansas City this week. I'll shoot real/final pics when I get back this weekend.

    edit :yeah its the 46 sanchez

  19. #19
    Bicycle Repair Man !!! Sixty Fiver's Avatar
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    Lucky kid, great dad.

    We want more pics.

  20. #20
    Senior Member docboyd's Avatar
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    what you gunna do with that other brake?

  21. #21
    GONE~
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    Quote Originally Posted by macnab View Post
    Kansas
    Dorothy?!

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