So I live in NYC. For 15 years (the last 12 of which I've lived here) I've been riding around on a 40 pound Jamis Ukiah steel-frame mountain bike. Totally indestructible but slow as hell. I finally got sick of lugging it around, plus the fact that it was too small for me - purchased when I was 15 heh...

So I just picked up a stock 2006 specialized tricross comp, which I love. It's light, fast, the right size frame (58cm), and the gear shifters are ace. The problem is that historically I have used my bike to go everywhere in the summer; I almost never take the subway when the weather's nice. Going to brooklyn for house party? Biking. Going to chinatown for lunch with the wife? Biking. Going to buy socks from Uniqlo? Biking.

This was all well and good with my old mountain bike which had no quick releases and wasn't particularly valuable. This lovely specialized has quick release front and rear wheels, and the handlebars and handlebar post are affixed with a total of 5 standard sized metric allen wrench screws.

I want to buy some security for this bike so if I make the 50 mile round-trip from my house to Coney Island I can get dinner on the boardwalk without having to worry about some idiot with a set of allen wrenches making off with my seat and handlebars. I realize I can get some Kryptonites for the front and rear wheels but that doesn't help with the other stuff. To say nothing of the awesome little bell on the second set of brake levers.

Is this just a complete fools errand, leaving me with no choice but to keep the Ukiah for days when I know I will need to lock up and just use the Specialized for biking for the sake of biking which would make me sad but I can accept it if I have to...

Isn't there some super light cyclocross bike that's made from a single piece of extruded carbon fiber so there's nothing to remove?! Will I have to buy a pair of vicious pit bulls to guard my precious new ride?

Thoughts? Thanks!