Park tool emergency tyre boot tb2the fastest easiest and most secure way to repair a cut or worn tire sidewall the tb 2 is produced using a strong waterproof vinyl membrane with fiber weave reinforcement a super strong pressure sensitive adhesive assures the boot stays in place in any tubed tire road or mountain high or low pressure a true ride saver featuresthe tb 2 measures approximately 76mm x 45mm 3 x 175buy park tool repair kits from chain reaction cycles the worlds largest