Originally Posted by
pm124
Ahh, but the Birdy is a great climber once you can figure out how to stop bobbing. It should also get up to the speed of your road bike once you get rid of those damn Maxxis tires and throw on some Stelvios. However, your ride quality will deteriorate, you'll get stuck in some of No. Cal's notorius road ruts (including some on the way to Tilden and down that caught me), and you'll get flats.
I've never had a flat on the Birdy Maxxis tire, but it's much slower than the Stelvio.
I changed the old Birdy tires to Marathon Racers when I bought my NOS Birdy and the improvement was amazing. Have you tried them? I suspect that they give most of the speed of the Stelvio with puncture protection and comfort at least as good the Maxxis tires.
David