Slime Super Thick Self-Sealing Bicycle Tube Schrader 26" x 1.75-2.125" Bike Inner Tube - 30081

Moved from Midwest to Phoenix Valley two years ago. Flat tires every time we rode bicycles. 'Goat-Heads', are everywhere. They remind me of what we called 'sand-burrs' back in Indiana. The Slime Heavy Duty 26" bike tubes have STOPPED the flat problem. We recently bought a used bike with 26" tires and before riding, had 'these' Slime inner-tubes installed. They're supposed to last, or, be effective (slime fluid seals punctures) for two years. Over a year on two bikes, four tires, there has been no sign of a puncture. And, the tires have maintained the original air pressure! A more constant temperature here may be the reason but the bikes before installing Slime Extra Thick tubes, need aired-up every couple of weeks. They are amazing and though heavy, we can't feel the extra weight when riding! I hope they become available for 700cc and 29" tubes, soon.