Renewing derailleur and cassette.

[Salty seadog]

When you say you have been having shifting issues ...

Gears not changing well, or not sitting in gear? or the chain is slipping on the cog without gear change?

Gears not changing well on the largest 4 sprockets at the rear, needing an extra bit of push on the shifter. I think every now and then out skips two cogs.

Was the cassette replaced by the lbs or not?

OP appears to contradict.

The lbs did put a new cassette on but although slightly improved the problem remained so I got the original put back on.

 

[Tin Pot]

Might be worth looking at the shifter as well. I had a few issues last year that wouldn’t go away until the shifter itself failed and I had to replace it.

 

[T4tomo]

Gears not changing well on the largest 4 sprockets at the rear, needing an extra bit of push on the shifter. I think every now and then out skips two cogs.




The lbs did put a new cassette on but although slightly improved the problem remained so I got the original put back on.

new cassette with old chain is not a good idea. Always put new chain on with new cassette

 

[Tin Pot]

new cassette with old chain is not a good idea. Always put new chain on with new cassette

Disagree

 

[Ajax Bay]

Disagree

Why?

 

[PpPete]

Old chain + new cassette = accelerated sprocket wear so you soon won't be able to run it with a new chain either.

 

[Tin Pot]

Why?

That idea comes from bikes that are not maintained regularly, never swap wheels, nor cassettes.

There is no reason to swap any component unless it, specifically, need replacing.

If there is no chain stretch, if the chain is good, don’t change it.

 

[pclay]

Do you think a chain tool is more or less accurate than measuring 10 links (10") with a steel rule? Why?

Yes. Chain tool is manufactured to tolerances. A steel rule is done by eye. Already stated above that OP has a different number than the LBS (0.5 or 0.4 %)

 

[Tim Hall]

Yes. Chain tool is manufactured to tolerances. A steel rule is done by eye. Already stated above that OP has a different number than the LBS (0.5 or 0.4 %)

Is that yes the chain tool is more accurate or yes the chain tool is less accurate?

 

[Salty seadog]

Yes. Chain tool is manufactured to tolerances. A steel rule is done by eye. Already stated above that OP has a different number than the LBS (0.5 or 0.4 %)

I'm using the park cc2 checker with the adjustable lever and I'm not a big fan, the shop used something else but we were both close to each other in our readings as there is a human element to actually coming up with a number rather than a drop in yes/no tool.

 

[T4tomo]

That idea comes from complete bollox.

Fixed.it for you

 

[Tin Pot]

Fixed.it for you

 

[Illaveago]

Did you say that you rode your bike for 2 1/2 years without any problems but that it is now not indexing correctly? It sounds to me that there is some play in the rear mech.
If the problem was only cured temporarily by the fitting of a new chain and cluster it seems to suggest that the rear mech is at fault.

 

[Salty seadog]

Did you say that you rode your bike for 2 1/2 years without any problems but that it is now not indexing correctly? It sounds to me that there is some play in the rear mech.
If the problem was only cured temporarily by the fitting of a new chain and cluster it seems to suggest that the rear mech is at fault.

It wasn't cured. The shop fitted a new cassette but whilst there was an improvement the problem was still there so I put the old one back. I think I'm going to go with putting a new cassette and chain and if it doesn't improve I'll look at new hanger then mech.

 

[raleighnut]

It wasn't cured. The shop fitted a new cassette but whilst there was an improvement the problem was still there so I put the old one back. I think I'm going to go with putting a new cassette and chain and if it doesn't improve I'll look at new hanger then mech.

You beat me to it, I was about to suggest hanger alignment.