Great for Cruiser and Mountain bike tires. ?Comfortable and Safe?After replacing the butyl rubber tube, it absorbs the impact on the uneven road surface, making riding more comfortable and safe. ?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. ?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. ?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. ?Size?AV32mm(Regular valve). 20" x 2.125-2.40 Fit 20-inch wheel, tire width between 2.125-2.40.

Wheel Size: 20 Inches. Bike Type: Road Bike. Material: Rubber. Valve Type: Schrader. Brand: YunSCM. Date First Available: March 30, 2021. Best Sellers Rank: #7,293 in Sports & Outdoors. Customer Reviews: 4.6 out of 5 stars 477 ratings 4.6 out of 5 stars. : B091BT6TS2. Part Number: ?YunSCM330124. Manufacturer: ?YunSCM330124. Material: ?Rubber. Brand Name: ?YunSCM. Item Dimensions LxWxH: ?3.15 x 2.76 x 2.36 inches. Package Weight: ?0.54 Kilograms. Item Package Dimensions L x W x H: ?9.61 x 4.37 x 2.83 inches.