Compatibility: Saurka TPU inner tube can fit Mountain Bike of 26''x1.75-2.3. Please order without worry. Born for Reducing Weight: Weigh only 63.8g (Single one), losing almost HALF WEIGHT comparing to traditional butyl rubber inner tube. Effectively make a Better Acceleration Performance and overall reduce the weight of your bike. Besides, the valve is made of plastic, which not only has less weight but also better air tightness than metal. Small Size Brings Portability: Thanks to about 78% decreasing in size compared to butyl rubber inner tube, now it is easier to have a spare tire with you when you go out for riding. Lower Rolling Resistance: Riding faster in TPU inner tube is based on decreasing 20% of Rolling Resistance than butyl rubber inner tube. Lighter, softer and lower friction make this happen. Great Puncture Resistance: TPU material offers cyclists a sturdier inner tube, significantly reduce the probability of puncture to keep your cycling journey uninterrupted and happy. Start your journey with Saurka's excellent quality TPU inner tube and experience a more comfortable riding.