Which front derailleur with shimano sti?

[westy1977]

Hi, sorry if this has been asked before. But we have a bike that’s been put together from bits. It’s mostly older XT. The shifters are sti. The front derailleur jumps from bottom to too ring and down again when shifting, misses the middle ring. Have I got the wrong derailleur? I just assumed they went where the shifters told them. I’m not the best at setting things up so be gentle. I’ve attached pics of what we have.

 

[legrandefromage]

you need a slightly older front mech

The current one is for a later generation of shifters that have a slightly different cable pull

try Deore DX , MT60 or MT62, Deore XT M730/ M732 or Deore LX M550 or M560

theres others that fit but they are from older groupsets

What size is the band, I have a few here for postage costs and a pint or half

 

[westy1977]

you need a slightly older front mech

The current one is for a later generation of shifters that have a slightly different cable pull

try Deore DX , MT60 or MT62, Deore XT M730/ M732 or Deore LX M550 or M560

theres others that fit but they are from older groupsets

What size is the band, I have a few here for postage costs and a pint or half

Thanks for the reply, makes total sense. When you say size of band, is this the diameter of the seat post tube? If so it’s a little over an inch, about inch and eighth. The seat post itself is an inch. It’s a bottom pull with cable coming from below if that makes any odds. I’d like to take one if that’s ok?

 

[westy1977]

Tried to get a pic but it’s not the best

 

[CassidyAce]

Yes. At the risk of stating the obvious: inner diameter of the band = outer diameter of the seat tube. Standard sizes are: 28.6 mm, 31.8 mm and 34.9 mm. Yours looks like 28.6 mm but the clamp diameter in mm is usually stamped on the inside of the clamp itself, so you can double-check by looking on the derailleur that's already fitted.

 

[westy1977]

Yeah that makes sense. It is 28.6mm and like you say stamped on there. Thank you.

 

[legrandefromage]

I've a couple here if you want one

 

[westy1977]

I've a couple here if you want one

Ok thank you, do you have an XT? What would you want for one?

 

[legrandefromage]

Only LX here but if you put up an ad in the wanted section you should get loads

 

[westy1977]

Only LX here but if you put up an ad in the wanted section you should get loads

It’s not vital, it has XT rear and shifters. What you want for an LX?