105 Rear Derailleur & Tiagra Shifters

gb155

As above, would a 105 Rear Derailleur & Tiagra Shifters work together ?

will3

They do on my bike

FWIW generally if you mix the same speed (ie 9speed, 10 speed etc) shifters with derailleur and use the same brand (ie shimano with shimano or campagnolo with campagnolo) it will work fine.
You can usually mix 10 speed shifters with 9 speed deraileurs also, but you have to be a bit more carefull with chain widths etc

gb155

Great thanks, I assume it will make shifting smoother than the rear Tiagra thats on my bike now ?

will3

gb155 wrote:

Great thanks, I assume it will make shifting smoother than the rear Tiagra thats on my bike now ?

No idea TBH, have you had the tiagra on there for some time?

gb155

will3 wrote:

gb155 wrote:

Great thanks, I assume it will make shifting smoother than the rear Tiagra thats on my bike now ?

No idea TBH, have you had the tiagra on there for some time?

Yeah since new, around 2500 miles now

will3

gb155 wrote:

will3 wrote:

gb155 wrote:

Great thanks, I assume it will make shifting smoother than the rear Tiagra thats on my bike now ?

No idea TBH, have you had the tiagra on there for some time?

Yeah since new, around 2500 miles now

Was it always bad or has it got worse:? If you've been cross chaining a lot, it's possible that your jockey wheels have some wear (although 2500 would be a bit quick). Also possible it just needs a good clean and slight tweak of the adjusters.

gb155

Shifting in general is good, however when I stand up and put the power down it gets pretty rough, but to be fair its always been like that, I assumed that 105's are smoother when you put the hammer down ?

will3

Shifting to a harder gear can also be lazy if your cables are sticking due to dirt/corrosion etc.
Shifting under power is always a bit worse IME, not to mention not terribly good for the drivetrain.

Canny Jock

May not be a problem with the derailleur, more likely cables, chain or cassette as above. A Tiagra should work fine. Also, shifting under full power is probably always going to be rough.

Isn't 105 10 speed?

Aidy

All shimano derailleurs should play happily with all shimano levers, regardless of how many speeds they support.

will3

Aidy wrote:

All shimano derailleurs should play happily with all shimano levers, regardless of how many speeds they support.

erm that's not quite true as MTB and road have different pull ratios

benno68

Are the cassette, chain and deraillure nice and clean GB155? After a week of commuting the running gear needs a degrease and lube, slip the cable out and clean and lube that too just like Will3 has pointed out.

I've never had 105 but I doubt that there will be a significant difference, especially if your changing gear under force.

I would think that a 10sp 105 would work on a 9 speed shifter with the limiter screws set correctly.

will3

I have a cast iron solution for you:

1) Get yourself an old 5speed bike (with an old pre uniglide freewheel)
2) Ride this for a month being sure to do lots of gear changes under power
3) Get back on your Hyperglide cassette equiped bike - the gear changes will seem awesome!

gb155

Thanks for the advice guys, new shiney bits are always welcome, so maybe a 105 and a pinch of everyones advice should be the order of the day

Aidy

will3 wrote:

Aidy wrote:

All shimano derailleurs should play happily with all shimano levers, regardless of how many speeds they support.

erm that's not quite true as MTB and road have different pull ratios

Since when?

[Edit] Right, front derailleurs are different. [/Edit]

will3

gb155 wrote:

Thanks for the advice guys, new shiney bits are always welcome, so maybe a 105 and a pinch of everyones advice should be the order of the day

Sounds good - but do let us know if it actually makes a difference!

will3

Aidy wrote:

will3 wrote:

Aidy wrote:

All shimano derailleurs should play happily with all shimano levers, regardless of how many speeds they support.

erm that's not quite true as MTB and road have different pull ratios

Since when?

Um, well thinking about it that's for the front derailleur, I think. :oops:

gb155

will3 wrote:

gb155 wrote:

Thanks for the advice guys, new shiney bits are always welcome, so maybe a 105 and a pinch of everyones advice should be the order of the day

Sounds good - but do let us know if it actually makes a difference!

Will do

Considering a full 105 upgrade but dont have the funds at the moment, need to re-spray my MTB first, but thats another topic

prawny

Might just be frame flex when you're hammering it. I've heard of it happening especially with bigger lads. And i've heard about your sprinting power!

gb155

prawny wrote:

Might just be frame flex when you're hammering it. I've heard of it happening especially with bigger lads. And i've heard about your sprinting power!

Yeah thats a fair point and A great sprinter am I

biondino

Unless the Tiagra is very worn and needs replacing for whatever reason there really isn't enough of a performance difference between it and 105 to justify the effort and expense of the upgrade.

oscarbudgie

biondino wrote:

Unless the Tiagra is very worn and needs replacing for whatever reason there really isn't enough of a performance difference between it and 105 to justify the effort and expense of the upgrade.

+1

May as well go for Ultegra or Force, if the frame is worth the investment

Avoneer

Yeah, that's my understanding.

Your moving from 3 to 5 on a 10 point scale and the difference will be negligible.

We all like bling, but save up for some Ultegra - that'll be like 3 to 10 ish.

Pat...

El Diego

105 is rubbish.