I've got an EZ-Tad SX; it's definitely heavy. With fenders, lights, mirrors, rack and an admittedly overpacked rack bag, it tips the scales at just shy of 75 lbs. As far as durability's concerned, I've got a little over 1300 miles on mine so far; all I've had to replace are the tires and tubes. I'd definitely upgrade the tires to 100 psi tires; the new 100 psi Kwests are noticeably faster the 60 psi Kwests it came with. There's only one size, but the seat and boom can both be adjusted, so there's a wide range of sizes it can fit.
Last edited by rdmjr; 07-29-09 at 07:54 PM.
Reason: To actually answer brad3104's question...