compact to a triple

[Graham1]

I am thinking of changing from a tiagra compact to a triple, when I change the chainset I guess I will need spacers does anybody know whether the spacers come with the chainset, according to shimano web site the bottom bracket is the same for triple or compact.

 

[TheDoctor]

You shouldn't need spacers. The BB is the same, it's the axle that'll maybe be a different length, but that's an integral part of the crankset anyhow.
You do know you'll need new front and rear mechs, don't you?

 

[Will1985]

Spacers??? I'm not a Shimano expert, but a bit of digging around leads me to assume that you have a Tiagra FC4550 and want to change it. The spacers you talk about is the Hollowtech bottom bracket. No need to change that. Check that your rear derailleur has a long enough cage. You'll also need to adjust the height of the front derailleur on the seat tube.

 

[Graham1]

Thanks for the replies, I know about the front and rear mechs, on the shimano blow up documents it shows spacers being used on the triple but not the double.