Size:20x4.0 inch fat bike tire The ultra-wide size of 4.0 can provide very good stability and comfort for your riding. And the bike tire tread is designed with a unique texture process, which can provide effective grip and balance 60 TPI for high security In order to improve the puncture resistance of the tire, this fat bicycle tire adopts a 60tpi manufacturing process and a unique rubber synthetic formula. Compared with other 27tpi or 30tpi, the puncture resistance of this 4.0inch bike tire has been significantly improved Excellent grip Unique fat tire tread pattern design and high-quality synthetic rubber materials make this bike tire have very good grip performance and can adapt to various complex roads Foldable and Easy to carry Although this fat bike tire looks very fat, it is very light and easy to carry. For example, it can be used as a spare bike tire. You can easily put it in your bag when you ride outside.