I recently changed my chain on my roadbike. It's a roadbike made to a single speed.

Anyways, the new chain is a bit thicker than normal. I applied the same number of chain links to the new chain. After switching the chain, the chain jumps/slides under pressure. A problem I had before because the chain wasn't tight enough.

This time i can't figure out why the chain jumps. It looks tight enough. Could it be the width of the chain?

  • 3
    How old are your chainrings? This may happen if you put a new chain on the worn chainring/cassete.
    – k102
    Commented Feb 11, 2020 at 8:40
  • Thanks for the tip @k102 1.5 years, they look ok. But maybe I should try and replace them as well.
    – nammerkage
    Commented Feb 11, 2020 at 8:46
  • Did you install a 1/8 single-speed chain on a bike with 3/32 derailleur chain sprockets? That may be an issue in itself. Commented Feb 11, 2020 at 16:21

1 Answer 1


No. Most common chains are 1\8 (single speeds) and 2/32 for your average multispeed chain. Of course 8 and 9 speed chains can be thinner. It may be your sprocket. You didn't state how many miles is on the bike in it's current setup. If the rear sprocket is worn, chain will skip.

Also if the chain alignment is too far off, it will skip or come off. A single speed set up puts more load on a chain without a derailleur to dampen some of it and hold it in place.

A bent chainring on a crank can possibly throw it off or cause similar problems.

If you just shortened your chain and pieced it back together by driving the pin back between the links versus using a or the masterlink, that point can be too tight and inflexable depending on how far the pin was pushed in. It can be microns of a difference and that link won't flex.

  • 2
    FYI, all derailleur chains have the same internal width of 3⁄32 in (2.4 mm). The difference in chain width for different number of speeds is the external width Commented Feb 11, 2020 at 16:19
  • 1
    Also, a single-speed setup puts less strain on a chain that a derailleur setup as the chain does not have to deal with cross-chaining or gear shifts. Commented Feb 11, 2020 at 16:37

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