When your Saturday long ride takes you over a few stretches of questionable tarmac, you aren't as surprised as you are frustrated when you feel the undeniable "thump" letting you know you have a flat. Fixing the gash in your tire won't take you off the road for too long if you have Park Tool's TB-2 Emergency Tire Boot Set stashed in your saddle pack. Made with fiber-reinforced vinyl, the waterproof patches attach easily to any tubed tire, mountain or road with a strong, pressure-sensitive adhesive, and promises to stay firmly in-place whether you run your pressures at high or low PSI.