I have a Specialized Tricross fixed gear that I use for commuting. However, I enjoy riding fixed so much, that I like taking my FG on my usual road rides. Only problem is that I am noticeably slower on the Tricross than I am on my road bike, and am not able to hang with my groups as easily. Is the Tricross frame capable enough for me to upgrade and add some speed, or should I go with something like a Wabi?

The Tricross is setup with fenders and 32c Vittoria Randonneur tires on Mavic Open Pros. Are the fenders and tires really holding me back that much? From searching the forums, it doesn't sound like switching from 32's to 25's will make a big difference in speed, contrary to what I thought. So then why am I so much slower? Is it frame design? Weight? Something else?

Wabis are fantastic bikes, and I hope to own one someday. But the Tricross seems to have some similar benefits: road/less aggressive geo, and a higher bottom bracket for cornering clearance. Is it that much heavier than a Wabi?

Obviously rider strength/ability is something I can work on, so I'm really just wondering if modifications to my Tricross would make i nearly as capable as a road training FG like the Wabi.