30 PSI, 24" Kenda Kiniptions, and a generic tube leave just enough room for a flat-free pedal kick. This strikes a decent balance between pop and responsiveness while minimizing pinch flats when riding street. (20 PSI is fine for my backyard “course”.) The source of the still: A scrappy, headless clip of one of my favorite features in Portland. It's always fun to return to this after riding brakeless #bmx for awhile. #portland #downtown #pdx #biketrials A video posted by Jon-Michael Deldin (@jmdeldin) on Sep 7, 2015 at 9:37pm PDT