When Schwalbe dropped the Marathon Supreme and didn't bring in a 26" (559) version of their replacement I thought we might have trouble finding anything nearly as good for our Thorn tandems. When I saw Continental's Contact Urban were getting good reviews in the Brompton size and had three widths in 26", it looked worth a try. I got some in 47mm width from Germany, as SJS didn't have them at the time, and put a pair on our Raven Discovery Twin. I'm very pleased with how they roll and have had no grip problems in wet conditions and after a few hundred km. there is no significant wear. Obviously the final verdict will take a few thousand more km but so far I'm hopeful they are a winner for our tandems and solos too.