I hooked up some 27 by 7/8 (630:20) Avocet folders to my vintage Rigida wheels and have been pretty stunned at how well they ride at 125 psi... and how freaking fast they are.

The 700:28 Schwalbe Marathons on my touring bike don't ride this well and the hook up and handling of the Avocets is nothing short of amazing as they still remain supple at their high psi.

I simply love the sound they make at high speed.

A lot of the ride quality stems from the fact that my Avocets are under my 1973 Raleigh Gran Sport that has a 531 frame and a 531 Carlton fork while th4e Marathons are under my Al trek 7500 which is a very rigid bike.