自補式內胎

Picked up a nail last week and this sealed the puncture before I even lost pressure, no mess, no walk home. The self-sealing tube just works, and it's nice knowing the stuff inside is non-toxic and water soluble if it ever leaks.

Wasn't sure a tube could handle the goatheads around here, but it sealed a small puncture right up without me even pulling the wheel off. The fact that the stuff is water soluble made cleanup easy when I topped off the tube later.

Picked up a slow leak from a thorn on my commute and this sealed it right up. The tube's already filled with the exact amount of sealant so I didn't have to measure anything. Water soluble too, so rinsing it out later won't be a mess.