Originally Posted by
bigun83
Here's what I'm working with right now. All stock of course.
Component Group..... Shimano Sora
Brakeset................. Scott Pro SCBR-530 brakes, Shimano Sora STI Dual Control levers
Shift Levers............. Shimano Sora STI Dual Control
Front Derailleur......... Shimano Sora Triple
Rear Derailleur........... Shimano Sora
Crankset.................. Truvativ Isoflow Road, 30/42/52 teeth
Rear Cogs................ 8-speed, 12 - 25 teeth
Chain...................... KMC IG-51, 1/2 x 3/32"
Whataya think?
OK, so you now have 8-speed Sora with a triple front. Your upgrade is possible, it's just going to cost. The biggest sticking point is that most (maybe all) Shimano systems with both shifters in the lever are 9-speed, so you need to factor in a new cassette and perhaps chain.
Whoops- I'm wrong. There is a new Shimano lever set that's 8-speed and dual-lever shifter:
http://www.universalcycles.com/shopp...88&category=10