105 Rear Derailleur & Tiagra Shifters

[gb155]

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

 

[adscrim]

Yes, this is my current set up.

 

[Dave Davenport]

If it's an older 9 speed 105 rear mech no problem, if it's a new one they're 10 speed and Tiagra is 9.

 

[gb155]

Yes, this is my current set up.

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

 

[Dave Davenport]

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

I wouldn't think it would make that much difference to the shifting, are your cables & outers in good nick?

 

[gb155]

Yeah they are all good, shifting is ok but when I stand up and change its pretty rough.

 

[adscrim]

Do you mean changing while standing up on the pedals? This is pretty much always going to result in crunchy shifting I would have thought.

 

[PpPete]

Don't think any of it will change that well if you are standing on the pedals. Back off the pedal pressure a little for each change and it should be smoother.

Changing to a higher spec mech won't make a whole lot of difference.

I wrecked my Tiagra rear mech a few months ago, and was fortunate to get a really good price on an Ultegra to replace it. Wouldn't say the shifting performace is that much better.

 

[Dave Davenport]

If you're a big guy and you're changing gears under load, out of the saddle I'm not surprised the shiftings a bit rough!

 

[Landslide]

If it's an older 9 speed 105 rear mech no problem, if it's a new one they're 10 speed and Tiagra is 9.

Doesn't matter, as all Shimano mechs (except old Dura Ace) have the same geometry. The important thing is to match the shifters with the cassette.

 

[gb155]

Thanks for the advice guys

 

[MartinC]

According to reviews I've seen the latest 105 10 speed shifters and rear mechs operate on a different cable pull and aren't compatible with previous S stuff.