Bicycle chain 'grabbing' cog

Roady · 3 Mar 2013 at 09:53

Have a standard bike that I refitted the rear wheel on (it wasn't spinning true as the bearings had loosened on the axle) since then the smallest pedal cog/sprocket 'grabs' the chain (which then jams).

I'm by no means experienced maintaining a bicycle, but fairly experienced mechanically (and technically).

Any tips/ideas on what might be causing this? It only seems to happen one the 1 cog, which is the most frequently used! All oiled and nothing fowling it that I can see!

If I can't sort it today I'll be taking it to halfrawds to sort :/

godinman · 3 Mar 2013 at 10:10

Rather than halfords you might want to try and find a decent independent local bike shop, they'll be better at the job and you'll be supporting small bike shops which are awesome.

Can't help with regards to your problem however sorry!

Roady · 3 Mar 2013 at 11:02

I would usually, but not many are open on Sundays!

neil_g · 3 Mar 2013 at 11:15

if the wheel has shifted horizontally as a result of things being tightened back up the gears may need readjusting.

Roady · 3 Mar 2013 at 12:30

Hmmm, I certainly don't know how to adjust the gears! Going to try readjusting the wheel to see if I can sort it that way... Thanks neil_g!

6thElement · 3 Mar 2013 at 12:56

If that's your most used cog on the cassette it could be worn out, this can make it hold on to the chain too long.

Vonhelmet · 3 Mar 2013 at 13:27

I think we need some clarity on this...

The chain is sticking in some way on the small chainring ie at the pedal end of things.

That right?

And what had you done when fixing the rear wheel? Had you taken everything apart? Did it all go back on in the right order?

Roady · 3 Mar 2013 at 18:16

It seems neil_g was correct! I adjusted the rear wheel some and tightened it back up - problem solved!

Von your clarification was correct!

Thanks all