SIR Maxxis I highly doubt riding can cause Plantar Fasciitis. I bought a MTB after i was not able to walk after a decent length run, my Plantar would flare up and even after icing and stretching it was a nightmare. Thank goodness ZERO pain after riding even after 3-5 hours riding (Holding thumbs but after 6 months it's a pretty good indication riding wont flare it up). Just a personal experience comment.
