Less chain noise?

on my geared bike, the chain bangs sometimes - does anyone know what it could be?

gears

And you're cog is slipping. Loctite it up.

So I basically need to glue my cog?

Doubt it, just tighten it the fuck up then tighten the lockring

tighten the cog first, and then tigthen the lockring.

sound like a simple case of the cog/locking not being tightened enough.

Call me stupid and all that, but do I need any special tools for that so I need to go to Evans or something, or can I do it at home?

Yes you do need special tools, it's worth getting despite the cost of it, the Shimano chain whip is the best you can buy;

And you can do it at home quite easily, also ensure that you'll be safe in the knowledge that you've tighten them properly.

if you can't get the lockring off, get on the bike, support the back wheel on something so it doesn't slip (or squeeze the brake), try and push a lots of weight on the pedal enough to tighten the cog so the locking can be removed a bit easier.

Cheers edscoble, you certainly know your stuff!

Phil,
the same thing used to happen to my MTB before I 'converted' it, I used to remedy it by tightening the little screws on the front and rear derailleurs. Bit of a trial and error thing, tighten them too much and you won't get the full gear range. If you're more conscientious than I, take it for a service.

Help - my chain line is doing my tits in. I've tried 2 different chainrings both 3/32 42T &44T, two different chains 3/32 & 1/8th, and two different sprockets both 15T 3/32.
Noise still persists, it sounds like when you get chain rub on a front deraileur i.e. same pitch suggesting its happening ever time a chain link passes. The noise is less pronounced when out of the saddle or pedalling hard. I've some pics of my chain line, can anybody see anything wrong?

http://picasaweb.google.co.uk/norman.mckissick/Chainline?feat=directlink

Have you tried turning the bike upside down and shoving something soft inbetween the tyre and the frame (like an old t-shirt) to create resistance then hand pedalling and having a look / listen?

Is the B.B in good nick?

Help - my chain line is doing my tits in. I've tried 2 different chainrings both 3/32 42T &44T, two different chains 3/32 & 1/8th, and two different sprockets both 15T 3/32.
Noise still persists, it sounds like when you get chain rub on a front deraileur i.e. same pitch suggesting its happening ever time a chain link passes. The noise is less pronounced when out of the saddle or pedalling hard. I've some pics of my chain line, can anybody see anything wrong?

http://picasaweb.google.co.uk/norman.mckissick/Chainline?feat=directlink

sounds like your chainline is off, hard to tell from the photos though

are you sure it's dead straight?

I'll give that a go, BB is brand new Miche, spins and spins when chain is off, in fact whole chain line spins well when chain is on which is the frustrating bit.

I measured it, its out by 1/2mm at most with dura ace cog, was dead on with the Miche cog - same noise. Only common denominators are crank, frame and gear ratio.

sounds strange.

read somewhere that people got more / less noisy driveline with different chains, can't remember which though, but worth a search

Chains are KNC and Wipperman, both recommended in threads on here?

how tight is it?
too tight = noise.
make it looser= win.

Its pretty tight, so I'll try slacking it off abit ta. I have a fear of chain coming off and wrecking rear wheel (or me)!

street slack™

it won't.
this is how slack your chain should be:

1/2" play up and down as you push the pedals.
in fact, for me (and that is my bike) that is too tight.

Will try the slack chain approach in the morning. Been off all last week and in a strange reversal of recent trends my geared bike hasn't had a look in, been lovin the fixed except for the bloody noise!!!!

Its pretty tight, so I'll try slacking it off abit ta. I have a fear of chain coming off and wrecking rear wheel (or me)!

don't worry bout that.

Good chain tension = 1-2 cm flex up/down on the middle of the chain

(too slow)

Andy.w - The chainring, chain and rear cassette are all in good order, and reasonably new - I'm pretty sure it isn't that.
Basically, whenever i accelerate out of traffic lights, or I'm pushing really hard up hill (i.e when I'm putting it under a lot of pressure), something goes "BANG" and it feels like something jumps or slips. I cleaned everything really well, but it still does it?

Mine did that just before the Quicklink thing gave out. Worth a look see/swap for £3 or so if you have one fitted.

do you have a good quality chainset?? cheaper ones may not be round so you'll get play.

it won't.
this is how slack your chain should be:

1/2" play up and down as you push the pedals.
in fact, for me (and that is my bike) that is too tight.

it's even says so in this cycling profiency booklet from the 60's.

haha ! A true champ Ed.