That round plastic thing on rear wheel

jndb72

Hi all,

While out for a ride in the wind, rain and mud today I noticed my chain started to bounce all over the place, expecially in lower (biggest rear cog) gears. A quick inspection found that the plastic thing that stops the chain slipping off the biggest rear cog had broken and was moving around all over the place.

I'm not even sure what they are called, but are they easy enough to replace?

The bike is a Canyon AM 5.0

Well p****d off now :evil: had more problems with this bike in 6 months than I did in 3 years with the trusty old RockHopper

Cheers

aidso

That plastic thing keeps the dirt out of the back of the cassette. Plenty of people just pull them off so they don't act like a spokey-dokey when they crack.
If you *really* wanted to replace it you would need a chain whip and a cassette removal tool. I'd say leave it.

Your chain is likely to be slipping off the end as the gears need indexing - cables stretched etc.

jndb72

Cheers mate, I'll remove the fecking thing and if that causes problems I'll sell the bike Well peeved, as you can probably tell.

Cheers

101_North

It's there to protect your spokes should your chain slip off the large cog. If your rear mech is set up properly it's not needed.

101

Chunkers1980

Out of interest what problems have you been having?

Canyon's are highly respected here.... Please do tell.

chez_m356

aidso wrote:

That plastic thing keeps the dirt out of the back of the cassette. Plenty of people just pull them off so they don't act like a spokey-dokey when they crack.
If you *really* wanted to replace it you would need a chain whip and a cassette removal tool. I'd say leave it.

Your chain is likely to be slipping off the end as the gears need indexing - cables stretched etc.

+1 to that, cables, indexing, limit screws or even a worn or damaged chain or cassette

jndb72

Chunkers1980 wrote:

Out of interest what problems have you been having?

Canyon's are highly respected here.... Please do tell.

Hiya mate,

Nothing major, just a lot of small niggly issues that have been there since day 1, don't get me wrong I love the bike just a bit peeved after today.

1. Rear wheel squeels like a pig - took it to LBS who changed the break pads and adjusted the calipers
2. Front wheel squeels like a pig - as per point 1
3. Rear gear indexing - changes from lowest cog to highest without a problem - but skips gears when coming back down - took to LBS who changed cable and re-indexed - worked fine for a few weeks - now as before visit to LBS
4. Today's problem

Granted, not end of the world problems, but starting to lose confidence in the bike as something seems to crop up every week. The afore mentioned points have been re-occuring issues that I never seem to have gotten to the bottom of.

I had the RockHopper for 3 years and apart from replacing the chain and the odd puncture nothing ever seemed to go wrong with it.

Cheers

jndb72

chez_m356 wrote:

aidso wrote:

That plastic thing keeps the dirt out of the back of the cassette. Plenty of people just pull them off so they don't act like a spokey-dokey when they crack.
If you *really* wanted to replace it you would need a chain whip and a cassette removal tool. I'd say leave it.

Your chain is likely to be slipping off the end as the gears need indexing - cables stretched etc.

+1 to that, cables, indexing, limit screws or even a worn or damaged chain or cassette

The chain ain't actually slipping off the biggest cog, I had the cable replaced and the gears re-indexed a few weeks back. I've also re-indexed the gears myself this afternoon (after I got back from my ride). Gears are working pretty much OK. Just mentioned in the opening post "that plastic thing that stops the chain slipping off". Sorry for any confusion.

Cheers

Chunkers1980

None of those are canyon's fault - All brakes squeal from time to time. All gears needs tweaking and maintenance. Number 4 is just a bit of plastic that's virtually pointless.

You just got lucky with your rockhopper

jndb72

Didn't say they were Canyon's fault. However, points 1, 2 and 3 have been there since day 1, out of the box.

chez_m356

jndb72 wrote:

Didn't say they were Canyon's fault. However, points 1, 2 and 3 have been there since day 1, out of the box.

sounds like just a poor setup from new, as for the gears, even with a new cable it will stretch after a while, which is normal, just needs adjusting, as for the plastic guard, not really important, quite a lot of people take them off

Growmac

Brakes are easy to set up. Loosen the two bolts, clamp the brake on, tighten the bolts up again. Job done. If it still squeals, then you can try taking the pads out and turning them round. Not so you're then using the backing as braking material obviously, just rotate the whole assembly 180 degrees.

As for the gears, that's just normal wear and tear. You saved about £500 on the bike, so maybe spend some of it on a book telling you how to maintain it? Or spend more and get better components that will be more resilient? Having to adjust and replace cables is completely and utterly normal, not a reason to replace the bike (although maybe check you've not bent the rear hanger causing the mis-match).

Sorry, I'm aware that sounds patronising, but can't think how to rephrase it so it doesn't so please excuse me.

Anonymous

101_North wrote:

It's there to protect your spokes should your chain slip off the large cog. If your rear mech is set up properly it's not needed.

101

And they're not "cool" so people rip them off together with reflectors and bells