BWSHLF 27.5" Bike Tubes (4 Pack), MTB Schrader Valve 35mm, Bicycle Replacement Durable Butyl Rubber Fit 27.5x2.1/2.4 - MTB 27.5 A V-35 4pack

• 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 0.8~0.95MM, but our sidewall thickness is 1.1~1.2MM, 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 35mm or F/V Presta Valve 48mm. 27.5 means our bike tubes fit 27.5” wheel (pls kindly confirm that your bike tire is suitable before you buy), width between 2.1-2.4 tire. Standard 35mm schrader valve and 48mm 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. There are no other products of inferior quality as gifts, and all the costs are spent on the products you actually buy 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