Replaced (not very old) chain, now rear mech won't shift
UnWeave
Posts: 33
tl;dr: I just replaced my chain (drivetrain has done <150 miles, wanted removable, stronger chain), and now the rear mech won't shift properly, particularly on the largest ~5 cogs. Is it normal to need re-indexing?
Got a Carrera Fury a few weeks ago, mostly it was fine (aside from some turkey gobbling on the rear Juicy 3 - but that's a whole other matter). Anyway, stock chain was proving difficult to clean so I ordered a KMC X9.93, since it came with KMC's 'magic link' (wasn't sure if I could just attach these to my current chain, having not had one before, so just bought a new one. Seems like I didn't need to but too late now).
Shortened the chain to the same length as my previous one (which was largest cogs + 2 links, as it happens) and now shifting on the rear is all messed up. It doesn't want to sit in 1 (largest cog), and going 1->2, 2->3, 3->4, 4->5 is pretty bad, in decreasing order of, er, roughness. Once you're at 5 things start to smooth out and it isn't jumping between cogs too much, but it still isn't right.
Did I do something wrong? I wasn't aware that the rear mech would need indexing again just because I changed the chain. Also, I've never indexed before (only just getting into 'proper' bike maintenance, let alone setting one up). So, er, did I mess up or does it sound like there's something else wrong? Thanks.
Got a Carrera Fury a few weeks ago, mostly it was fine (aside from some turkey gobbling on the rear Juicy 3 - but that's a whole other matter). Anyway, stock chain was proving difficult to clean so I ordered a KMC X9.93, since it came with KMC's 'magic link' (wasn't sure if I could just attach these to my current chain, having not had one before, so just bought a new one. Seems like I didn't need to but too late now).
Shortened the chain to the same length as my previous one (which was largest cogs + 2 links, as it happens) and now shifting on the rear is all messed up. It doesn't want to sit in 1 (largest cog), and going 1->2, 2->3, 3->4, 4->5 is pretty bad, in decreasing order of, er, roughness. Once you're at 5 things start to smooth out and it isn't jumping between cogs too much, but it still isn't right.
Did I do something wrong? I wasn't aware that the rear mech would need indexing again just because I changed the chain. Also, I've never indexed before (only just getting into 'proper' bike maintenance, let alone setting one up). So, er, did I mess up or does it sound like there's something else wrong? Thanks.
0
Posts
yes having to reset the gears would be expected.
Parktools :?:SheldonBrown
Evil Sovereign
Er, I think it's fine. It definitely loops over in all the right directions, should I be checking anything more specific, e.g. slack between the guide and tension wheels (there isn't much)?
Evil Sovereign