why is my chain jumping gear?

7448stewart

My chain seems to be jumping gear at the rear when I shift, it is all set up correctly but I just dont know why its doing this, is there a problem with my chain??

The Rookie

Chain worn, sprockets worn, debris between sprocket lifting the chain off or poor indexing, or a combination of 2 or more......

7448stewart

cool ill just take it in to the shop then!

arthur_scrimshaw

If you've got any mechanical aptitude it will be cheaper to buy the tools and then you're set up for life. You only need a chain splitter, a chain whip tool and a cassette tool. Lots of advice on here how to do it or check out the Park Tools website.

cooldad

7448stewart wrote:

My chain seems to be jumping gear at the rear when I shift, it is all set up correctly but I just dont know why its doing this, is there a problem with my chain??

Or not set up correctly.

Cqc

That used to happen to me until I changed cassette, which by the way waa an absurdly easy job, which cured it forever. Whilst changing cassette, it is worth changing the chain at the same time to stop the new cassette getting worn out.

7448stewart

cool thanks very much, iv seen them chain whips, how do you use them?

Cqc

You wrap them around one of the larger cogs and have the handle on the left, and then you put a spanner or similar on the locking tool and push the spanner to the right whilst keeping the chain whip hand firm. It will need a bit of welly.

cooldad

If that’s your problem.

arthur_scrimshaw

7448stewart wrote:

cool thanks very much, iv seen them chain whips, how do you use them?

Check on YouTube, however I'd disagree with cqc, wrap it around the smaller sprockets, that way you've got better mechanical advantage by being closer to the lockring you're trying to undo. Also I'd recommend getting an all in one lockring tool, ideally with a locating pin for the hollow axle, much easier than using a spanner and tool. Something like this ...

http://www.chainreactioncycles.com/bbb- ... -prod60748

7448stewart

thanks very much, ill get there eventually

Chunkers1980

No, use the larger sprockets. Not sure what Arthur is talking about, the advantage is in the bigger cogs

cooldad

I use around the third biggest, roughly.

arthur_scrimshaw

Chunkers1980 wrote:

No, use the larger sprockets. Not sure what Arthur is talking about, the advantage is in the bigger cogs

You don't gain much mechanical advantage from the larger cog, but it's far easier to apply the force smoothly if the two tools are closer together as in this park tools guide. http://www.parktool.com/blog/repair-hel ... el-removal

Scroll about half way down.

In the end it's a matter of personal preference.

Cqc

There's not really any difference, apart from you get more leverage when you use a bigger sprocket and the chain part of the chain whip gets all used up. Arthur scrimshaw, my advice was for if you have the 2 separate parts like what most people have.

The Rookie

I use the second largest (not largest to remove any chance of it slipping into the spokes) good wrap on the sprocket and with a whole wheel to brace on, getting it close to the lock ring is pretty irrelevant!

arthur_scrimshaw

I disagree, if you're applying opposing forces with your hands it's easier to do so as close as possible to the same plane.

Chunkers1980

That's the thing, you're not really. You're just holding the cassette

cooldad

I put the wheel on the ground, vertical as if its on the bike, and push both down. Use your weight, not your muscles.

The Rookie

Yup, me to, never had a problem at all.....

arthur_scrimshaw

Chunkers1980 wrote:

That's the thing, you're not really. You're just holding the cassette

But by just holding the cassette you're applying the same or greater force as the lockring tool?

The Rookie

The OP came for advice on removing the locking, he's got it, you have some minority opinion on how it should be done, but I'm sure he"'s figured it out now how he wants to do it.

cooldad

Well. not really. He came on with a skipping chain. Assuming it's the cassette, now he knows how to do it.
If it's something else, at least he got to spend some money.

7448stewart

well that esculated quickly lol.

Thanks for all the advice ill try both ways and let you know what I like best