By geometry, I mean the frame/HB setup. You aren't going to gain any speed going to the 10 speed rear drivetrain, it just gives you more narrow range options. All you'd need to change out for a full on road bike would be the handlebars and brake Lever/Shifters. You can also do this a lot cheaper with maybe a set of trekking bars as mentioned above (Bow Tie bars), to get more hand positions.
Pick up some used Brifters off of Fleabay and a set of Cane Creek bars that would fit your stem clamp and you'll be good to go. That or a set of Nitto Noodles in Silver alloy for a match. Then you'd need some bar tape.
Originally Posted by
dvon1981
yeah, was just looking at the specs on specialized site, def VERY close in geometry between the two bikes, I guess I'd need to price out all the components I'd need to switch out, just seems like the cost of parts would exceed the cost of selling my bike and buying a new one, i'll def check out that option though. i'd def need to swap out the cassette as well since the sirrus has an 8 spd