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Tuning gears..

Posted: Mon May 26, 2008 5:29 pm
by janus77
Took my bike in for a service a few months ago, the gear changes have actually been worse since the service than before I took it in.

Is it likely that the gearset is wearing, or did the bike mech just f@ck it up?

How hard is it to adjust your gears at home so they shift perfectly?

Posted: Mon May 26, 2008 5:31 pm
by rustychisel
Not hard. What gears?

Posted: Mon May 26, 2008 5:39 pm
by janus77
Shimano Alivio (on a Kona dew).. FD working fine, it's just that the RD isn't changing crisply and is getting that clicking noise when it doesn't make it onto the next cog properly..

Posted: Mon May 26, 2008 5:45 pm
by Deanj
Going onto a larger cog? Turn the barrel adjuster counter clockwise (on the rear mech or on the shifter) to tighten the cable slightly, just a quarter of a turn or so at a time and try it out.

Rear derailleur adjustment

Posted: Mon May 26, 2008 5:48 pm
by Kalgrm
Just undo the inline barrel adjuster a little. It should be next to the gear shifter, which means you can wind it out a half-turn while you're riding along.

If it's not there, it will be next to the derailleur.

If it takes more than 1 turn, you'll need to delve a little deeper. Check out the Shimano web site for an installation instruction on a derailleur. You should also be able to find good instruction on the Park Tools web site. (edit: ... as linked to by Needsapush ....)

Cheers,
Graeme

Posted: Mon May 26, 2008 5:52 pm
by janus77
Thanks all for the info! :) I'll give it a go on the way home tonight.

Posted: Mon May 26, 2008 6:00 pm
by janus77
The adjuster's on the derailleur, too easy. see how she goes on the way home.

Should be interesting trying to make adjustments on the roll! hehehe.

Posted: Mon May 26, 2008 6:06 pm
by Kalgrm
With the barrel at the RD, you'll probably end up needing to put your bike on a stand to do the adjustment. Give it a go anyway, but if it doesn't work out, you'll know what to do when you get home.

Cheers,
Graeme

Posted: Mon May 26, 2008 8:10 pm
by janus77
screwed it a couple of clicks counter-clockwise before leaving work, seems to have helped, might need to muck around with it to get it just right.

thanks :)

Posted: Mon May 26, 2008 8:21 pm
by sogood
janus77 wrote:screwed it a couple of clicks counter-clockwise before leaving work, seems to have helped, might need to muck around with it to get it just right.

Please don't "muck around". Go and read the Shimano manual or one of the other info sites on the net. With the adjuster, you can actually over adjust and end up losing one cog on one of two ends.

Posted: Mon May 26, 2008 8:36 pm
by rustychisel
Sorry, just got back, anyway the advice you've been given is good. Get down behind the bike (in line with the cogs and the mech) and have a good squizz at what happens when you shift the barrel adjuster, paying particular attention to lining up the mech cage (below) with the cogs.

Also, examine your cable run carefully, often when a change is slow or sticky it can be that the cable run is impeded by crud, lack of lubrication, worn cable or cable outer.

Posted: Tue May 27, 2008 9:33 am
by janus77
Gears are running sweet, must've gotten lucky ;) on the first turn. hehe.

As far as lubricating the cables goes, do you just squirt a bit of lube onto the end points or what?

Posted: Tue May 27, 2008 9:49 am
by Bnej
janus77 wrote:As far as lubricating the cables goes, do you just squirt a bit of lube onto the end points or what?


Usually you won't need to do it, but if there is sticky crud around where the cables enter the outers then a bit of light lube and a wipe with a rag should fix it.

Only if the cable is dragging slowly, you should be able to feel it at the shifters/brake levers - the lever won't return as quickly as the spring would be working against a bit of friction.

Posted: Tue May 27, 2008 10:04 am
by janus77
Yeah, i don't think I'm having any problems in that department, the gear movements when I release the gears are fast enough.

Posted: Tue May 27, 2008 9:21 pm
by Mulger bill
Sounds like a bit of cable stretch is all then, nice fix Janus.

Shaun

Posted: Wed May 28, 2008 1:03 am
by Aushiker
G'day

I found this video really helpful in learning how to adjust the RD.

Andrew