Practical: Block-shaped grain-shaped tmary line is uniform and fine, have a good traction, suitable for good roads and daily off-road road conditions. Suitable for mountain cross-country, outdoor riding. Fat Bike Tire 20 x 4.0 parameters：Inflate to 20 P.S.I (140 KPA/1.4BAR). Package Include: 2 pcs 20" X 4.0" Fat bike tires, 2 pcs 20'' x 4.0 AV32mm Schrader Valve heavy duty bike tubes. It is mainly used for 20x4.0 electric bicycle tire, because it is used for electric bicycle tire, avoid the trouble of frequent replacement, the quality and thickness of the product are thicker than ordinary wide tire, better quality and more durable. Please check carefully for the details and size before purchase.It is compatible with electric bicycle fat tire, and ordinary bicycle wide tire can also be applied. All-Terrain Directional Tread: 20 x 4.0 front or rear fat bike tires go beyond the boundaries of traditional bikes and offer unmatched versatility, not only for mountain bikes, but also for e-bikes, snowmobiles and a variety of other types of bikes. After-sales service: If there is any problem about the product, you can contact us, we will try our best to solve for you! New soft wire technology: the tire can be folded, easy to store and carry. After the tire is opened from the folding mode, it is normal that it is relatively soft and can be installed normally. Please note: the steel wire part of the outer tire cannot be completely folded after receiving it, which will lead to uneven installation. If you want to restore the original shape after disassembling, you need to gently fold or roll it according to the received state, and do not overexert Note: Upon receipt of the product, please check whether the steel wire of the tire lip is severely bent and unable to recover and the steel wire metal leakage. Before installing the tire, check the rim tire for no burr before installing. If the inner tube bursts after installation, please check the tire again before replacing it to see if it is damaged, especially to check whether the outer tire has any broken lip steel wire, metal leakage, or cord fabric breakage. The tires are designed for regular all-terrain riding. Damage caused by extreme off-road riding, overloading, racing, modifications, or improper installation is not covered under warranty. For special requirements, please contact us via Amazon Messages before purchase to confirm.