On my single speed--a POS Bikes Direct bike--the rear wheel makes a clunking noise every time I pedal. I think it is coming from the freewheel and it's basically a CLINK! CLONK! noise that is driving me nuts.

I should mention that the seat stay on the left side of the bike is slightly longer than on the right. Therefore the back is asymmetrical. The tire rides perfectly in the center of the rear dropouts and between the chain stays. However, the tire is a right aligned to the right seat stay.

Here is a visual I sent to Bikes Direct to try to get them to fix it: enter image description here And here are pictures of the bike from various angles.

  • 4
    Bicycles don't have flywheels. Put pictures of your actual bike.
    – Batman
    Commented Jul 30, 2015 at 15:02
  • Sorry about that @Batman. Autocorrect made that assumption on my behalf. I have since edited it. I have also added pictures of the actual bike to this album: imgur.com/a/9s0Pw
    – Zlatty
    Commented Jul 30, 2015 at 17:34
  • I'm not seeing your claim for the circled part being bent (that arch seems to be by design) -- it looks like the wheel might not be centered in the forkends (which you can remove the wheel and center it) and the brake caliper may not be mounted straight (undo the mounting bolt, tilt it to be right and then tighten the bolt). But its hard to tell since the pictures are at sorta a weird angle.
    – Batman
    Commented Jul 30, 2015 at 17:50
  • 1
    Does it make the noise only when pedaling? Only when not pedaling? If it makes the noise while pedaling, does it sync with the pedals, or the wheel?
    – Brian G
    Commented Jul 30, 2015 at 20:43
  • 1
    From your previous comments I gather that the rear wheel is dual single/fixie wheel, right? Does your bike make the clunking noise when the back wheel is flipped to fixie side?
    – OttoK
    Commented Jul 31, 2015 at 17:17

1 Answer 1


From the comments above, it seems that it really is a free wheel that is making the noise.

Apparently cheap free wheels can be like that. Lubing them can help. This discussion has some extra info: http://forums.roadbikereview.com/fixed-single-speed/fix-shimano-freewheel-clunking-noises-150432.html

TL;DR version: Get some gear oil or grease gun and apply liberally.


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