$75 at the bike shop (if you can find them anywhere). 650B WTB Riddler Tubeless (or tubed) mountain bike tire. Fastest tires I have ever used that still have puncture and sidewall reliability. These are on my Mach 6, front and rear. VERY surprised at how durable these sidewalls are on tech terrain, for such a fast tread. No more sidewall tears. Side knobs are always there to save the day in hardpack turns. Rounded profile is simply blazing fast. Don't look to these for downhill braking on the rear, but everywhere else they shine.