strawstraw:www.pinkbike.com/news/Schwalbe-Double-Chamber-System-first-ride.html?trk=rss htt
strawstraw: http://www.pinkbike.com/news/Schwalbe-Double-Chamber-System-first-ride.html?trk=rss http://www.bikerumor.com/2014/02/08/schwalbe-x-syntace-dual-chamber-mountain-bike-tire-system-makes-super-low-pressures-safe-sound/ -- source link