2-Pcs 20" Fat Bike Tubes 20 x 4.0/4.50 AV48mm Schrader Valve Compatible with 20x4.0 20x4.1 20 x 4 1/4 20 x 4.30 20 x 4.50 Electric Bike Bicycle Fat Tire Tubes

Product Specifications: compatible with 20x4.0/4.5 Road bike /Mountain bike Tire 20 X 4.0 / 20 X 4.1 / 20 X 4.2 / 20 X 4.3 / 20 X 4.4 / 20 X 4.5 ( ETRTO : 100-406/114-406 ) bicycle tire tubes.

【High Quality】 The bike tube is made from premium butyl rubber.It has the advantages of good sealing performance, ozone resistance, aging resistance, shock absorption, electrical insulation.

【Easy Installation】Installation is quick and easy. Please follow inflation guide when airing a tire from a complete flat. Save time and effort, replace the old tube in a few minutes.

【Important Note】When changing a bicycle inner tube, be sure to add a little air before installing it. This gives it form so it doesn't get twisted or bunch up which may cause a pinch flat. Inspect for an even bead of the tire to the rim on both sides.

【Comfortable and Safe】After replacing the butyl rubber tube, it absorbs the impact on the uneven road surface, making riding more comfortable and safe.

100% product quality guarantee: We hope to do better in the tire, hope to listen to friends' opinions and suggestions, in order to provide better service and more satisfactory products.If there is any problem on the product within 180 days, you can get in touch with us, and you need to provide evidence pictures and relevant situation descriptions, so that we can respond quickly and save your precious time. We will try our best to satisfy you. Thank you for your trust!