Dry Chain Noise..

[Boon 51]

I have a Giant TCR 1 and have an odd noise..

If I'm riding at a steady pace on front 50 cog the gears 1,2,3,4,5 on the rear are OK but if I use 6,7,8,9,10. there is a noise just like a dry chain, but its the same chain so i dont understand.
What should I be looking at.. and why a 50/50 split..

 

[Kiwiavenger]

possibly the chain rubbing on your front derailier when your cross chaining. does yours have a trim function? my 2300 shifter will half shift to stop this from happening but i will normally change down at the front and up at the back to keep my cadence up and truer chain line.

 

[baldycyclist]

possibly the chain rubbing on your front derailier when your cross chaining. does yours have a trim function? my 2300 shifter will half shift to stop this from happening but i will normally change down at the front and up at the back to keep my cadence up and truer chain line.

this also saves chain wear...
some shifters dont do a halfy halfy therefore you need to keep in high at back and low at front or vice versa....I tend to use the mid range rear gears for both front rings and only the extremes with the relevent front ring.
You should really never do the extremes of top rear and top front as that does no components any favours.......

 

[baldycyclist]

possibly the chain rubbing on your front derailier when your cross chaining. does yours have a trim function? my 2300 shifter will half shift to stop this from happening but i will normally change down at the front and up at the back to keep my cadence up and truer chain line.

this also saves chain wear...
some shifters dont do a halfy halfy therefore you need to keep in high at back and low at front or vice versa....I tend to use the mid range rear gears for both front rings and only the extremes with the relevent front ring.
You should really never do the extremes of top rear and top front as that does no components any favours.......

 

[Boon 51]

I'm sorry but I might have misled you on the info on my first post..

I dont move off the 50 cog but the first five gears are OK but the last five run with the dry chain noise.. I have'nt moved off the front 50 cog..
Hope that is a bit clearer..
Cheers

 

[betty swollocks]

You shouldn't be using your 'last five' with your chain still on the 50 at the front.
It causes the chain to cut across at too sharp an angle, it promotes chain wear and noise and it's not very efficient.
As others have said, that noise may be your chain rubbing on the inside plate of your front derailleur, but it may be your rear derailleur complaining because it's more than fully extended, or both.

 

[Dayvo]

You shouldn't be using your 'last five' with your chain still on the 50 at the front.
It causes the chain to cut across at too sharp an angle, it promotes chain wear and noise and it's not very efficient.
As others have said, that noise may be your chain rubbing on the inside plate of your front derailleur, but it may be your rear derailleur complaining because it's more than fully extended, or both.

Agree with the above. And it sounds like you have the same problem as Nuttcat - that is, diagonal chain problems.

http://www.cyclechat.net/threads/bike-chain-catching-on-gear-changer.115085/#post-2088216

 

[Boon 51]

You shouldn't be using your 'last five' with your chain still on the 50 at the front.
It causes the chain to cut across at too sharp an angle, it promotes chain wear and noise and it's not very efficient.
As others have said, that noise may be your chain rubbing on the inside plate of your front derailleur, but it may be your rear derailleur complaining because it's more than fully extended, or both.

So its 1st five with the 50 and last five with 36 cog... thats not right ? I could understand with a three front cog set up, but not with a two cog.

 

[2Loose]

I can normally get away with the extreme 2 (7 biggest with the small chainring, 7 smallest with the biggest chainring) at each end without the chain rubbing against the front mech, but in all seriousness this still results in a chain being 'bent' too far from its ideally straight chainline.

 

[Boon 51]

mmmm I sought of understand what you are saying but gear 5 is OK but gear 6 is squeaky.. and the chain is as straight as it could be?

 

[2Loose]

unless you have a stiff link that doesn't like the smaller cogs...can you turn the bike upside down and watch the chain as you run through the gears? Might make the problem obvious....

 

[subaqua]

silly queation but is the chain properly lubed?

 

[Boon 51]

unless you have a stiff link that doesn't like the smaller cogs...can you turn the bike upside down and watch the chain as you run through the gears? Might make the problem obvious....

I will do that today and see what happens...

 

[Boon 51]

silly queation but is the chain properly lubed?

Thats a good question as I'm new to cycling and I'm waiting for my Zen maintenance book to arrive.
But it has just come back from the dealer from its first service so I would assume it would be right but to be honest I dont know?

 

[Rob3rt]

Boon, when in the large ring, as you move to the larger cogs at the rear, at the point the chain starts making that noise, try clicking the shifter as if shifting to the small ring, but only push it until it clicks once rather than all the way, it should move the mech a bit without shifting to the small ring, this is known as trim, and it's very purpose is to avoid noise!

You shouldn't be using your 'last five' with your chain still on the 50 at the front.
It causes the chain to cut across at too sharp an angle, it promotes chain wear and noise and it's not very efficient.
As others have said, that noise may be your chain rubbing on the inside plate of your front derailleur, but it may be your rear derailleur complaining because it's more than fully extended, or both.

I don't disagree with the principle, but IMO you should be able to use more than half of the cassette in each chainring. I use 7 out of 9 possible ratio's in each the big and small rings and I believe this to be perfectly acceptable practice. In fact I often even use the 8th largest cog when in the big ring when pulling away and I then shift up a couple.