BWSHLF 27.5" Mountain Bike Inner Tubes (4 Pack), Durable Butyl Rubber MTB Bicycle Replacement Fit 2.1-2.4，Presta Valve 48mm

BWSHLF 27.5" Mountain Bike Inner Tubes (4 Pack), Durable Butyl Rubber MTB Bicycle Replacement Fit 2.1-2.4，Presta Valve 48mm

• High-Quality Rubber Material: Different from ordinary inner tubes, we use 60% high butyl rubber. The air tightness of this high-quality rubber is 8 times that of natural rubber, and it is not easy to break due to temperature changes. The conventional sidewall thickness is 0.8~0.95 millimeter, but our sidewall thickness is 1.1~1.2 millimeter, which is thicker than the sidewall on the market and is more puncture resistant
• Various Sizes: 27.5x2.1-2.4; A/V Scharder Valve 35 millimeter or F/V Presta Valve 48 millimeter; 27.5 means our bike tubes fit 27.5inch wheel (pls kindly confirm that your bike tire is suitable before you buy), width between 2.1-2.4inch tire. Standard 35 millimeter schrader valve and 48 millimeter presta valve suitable for most mtb inner tubes
• Vulcanized Tubes: Each of our inner tubes have passed a strict 100% quality control inspection. And all tubes are round cured to ensure uniform roundness and better reliability. After explosion-proof and inflation tests, our quality control can give you 100% peace of mind
• Design: The exquisite carton contains four inner tubes for easy replacement and storage
• Please note: All inner tubes need to be put into the outer tire before inflating, so that the outer tire will protect the inner tire from exploding. BWSHLF is committed to becoming a good partner for all bicycle owners and enthusiasts