Originally Posted by Fastfwd
I just bought a specialized tricross. It has sora in front and 105 in the rear.
Will this cause me any problem? My LBS told me he could not put tiagra or 105 shifters on the handlebars because they are 9 speeds. Is it possible eventually to convert to 105 all around or will I be stuck with sora forever?
Your Sora is 8-speed, so you will need a nine-speed cassette and chain to upgrade to 105. But your Sora stuff will be fine. If it breaks, you can upgrade then, or replace it cheaply.
I mean, sheesh, most people actually ride the bike on the road a bit before they get caught up in the upgrade-itus...!