Advertise on Bikeforums.net



User Tag List

Results 1 to 3 of 3
  1. #1
    Junior Member kimak13's Avatar
    Join Date
    Jan 2006
    Location
    Brooklyn, NY
    My Bikes
    80's Peugeot Corbier beater fixed-gear, 90's Trek 1200 Aluminum Road Bike, 05' Jamis Dakar and Trek 7000 Aluminum MTB w/ road rims/tires
    Posts
    15
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Chain Tension/Rubbing Issue

    I was riding my fixed gear the other day when the front wheel slid out on a right turn and the bike and I went down on our right side. The rest of the ride home I felt what I believe was the chain slipping on either the cog or the chain-ring every so often.

    I assumed the slam to the pavement loosened the rear wheel, giving the chain too much slack and causing the slipping on either the cog or chain-ring. I pulled the wheel, degreased/lubed the chain and popped it back on, ensuring the chain had sufficient tension. I took a ride to make sure everything was okay, though I could hear the chain rubbing at one point during each rotation of the wheel.

    Upon closer inspection I noticed that there was normal chain tension at one part of the rotation and very tight tension at another point, which was when the rubbing was occurring. It was like the cog or chain-ring was oval shaped.

    I donít think this is a chain problem, as I have not had any issues with the chain before. Can you provide any ideas as to what might be causing this?

    Thanks in advance for your help!
    Small wheel turn by the fire and rod
    Big wheel turn by the grace of God
    Everytime that wheel turn round
    bound to cover just a little more ground

  2. #2
    . bbattle's Avatar
    Join Date
    Aug 2005
    Location
    Rocket City, No'ala
    My Bikes
    2014 Trek Domane 5.2, 1985 Pinarello Trevisio, 1991 Colnago Master, '06 Bianchi San Jose, 1987 Moulton Fuso, 1990 Gardin Shred, '82 John Howard(Dave Tesch)
    Posts
    12,050
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)
    Is your rim still true? It may have gotten a little bent on account of the crash. But on second thought, the hub should still be okay as long as it's in the dropouts even. Unless your spokes are loose.

  3. #3
    Senior Member pazzmore's Avatar
    Join Date
    Oct 2006
    Location
    tucson
    My Bikes
    2007 IRO Mark V fixed, 1971 Schwinn Spitfire stock newsie cruiser, 60's Schwinn Collegiate single speed, 1984 Azuki Imperial fixed, old unknown brand Tandem fixed.
    Posts
    271
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    most likely... i think.. is that your chainring was thrown out of wack. sheldon has an article on this and offers a step by step on how to fix it. however, i tried it last night and it was kinda hard to do without any prior experience.

    basically you loosen all the stack bolts to finger tight then turn the crank til the chain is taut. then, tap the chain with the back of a screwdriver or something making the chainring move slightly. then you keep doing it til it is best you can get it. then, tighten the bolts like you would lug nuts on a car. re-test it.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •