Originally Posted by
ct-vt-trekker
Be careful with the newer Tiagra triple cranksets, the smallest chainring does not use the old standard 74mm chainring bolt circle so you can't install smaller chainrings than the 30T it comes with. The 105 5703 has the 74mm so you can install down to a 24T.
Yes. Forgot to mention that.
Also what [MENTION=129066]Clifford S[/MENTION]ays is important. Get a long cage RD so it accepts 32t rear cog, otherwise your stuck with a max.of 28.