Derallieur is being lazy.

MTB noob

Yet another issue with my bikes. I have noticed that since i have bought my Shimano Tourney rear derallieurs on my bike 3 months ago (i know - cheapskate), they have become slower and slower to change gear.

This went from changing instantaneously to becoming annoying as i mostly need to over shift changing a gear to get it into the right chainring nowadays and then it still needs 2 crank turns to complete the shift. :x

This happens in both directions of the same rate and is now getting to the point that i am almost buying some new derallieurs.

Is there any advice from anyone or is the spring just worn out and not functioning properly :?:

Thanks

nicklouse

Mucky cables.

MTB noob

ill clean out the cable covers and see if that helps

cooldad

Replace them. With stainless inners and decent outers. For the price the one thing not worth skimping on.

allthegearnoidea

possibly that the cables have stretched too, cheap cables do stretch a fair amount, but as above, a good clean will help, if you dont already, and have regular muddy rides then Full outers do help a lot,

YeehaaMcgee

Cable stretch doesn't account for the behaviour mentioned here though. It's not bad indexing, it sounds like the return spring on the mech is struggling.

cooldad

Whenever my shifting goes shitty I replace the cables, 99.999999% of the time it solves the problem. OP says shifting is bad up and down, which I would think is more likely a cable problem than the return spring.

MTB noob

i found the problem - it was that the hanger was in an awkward angle and because the chain is cheap it twists easily, making the shifting rubbish.

bennett_346

On a side note im due to order some full outer and inner cables in the next few days, any reccomendations?

allthegearnoidea

Sp41 outer is the same as the XTR outers, that coupled with a good inner makes for Silky shifting!

jayson

Cheaper than XTR cables just use a length of shimano brake cable outer and run it full length from shifter to mech, its slightly bigger so the cable runs super smooth and will stay so with the full length.

I got a 10ft length from evans for a fiver so cheap as chips.