CALPALMY (2-Pack) Replacement 20 x 4.0 Bike Inner Tubes with Schrader Valve, Fit for Mountain Bikes and E-Bikes with 20" Fat Tires, Made from Premium Durable Butyl Rubber

Features

• 20X4.0 FAT TIRES TUBE REPLACEMENT：20 x 4.0" fat bike inner tubes, perfect for 20"x 3.5/4.0 fat tire tubes, tire tubes width diameters fit of 3.5-4.0 inches, with 32 mm Schrader valve. (20 x 3.5-4.0 or ETRTO size 100-406)
• PREMIUM QUALITY BUTYL RUBBER: Our 20 inch fat bike tube is made from premium quality butyl rubber, Constructed with heavy-duty butyl rubber for extended tube life. It excels in airtightness, tear resistance, and heat tolerance, these bike tubes maintain tire inflation throughout your ride, preventing air leakage. Elastic and strong, providing enhanced suspension for shock absorption.
• DESIGNED FOR FAT TIRE BIKES: Ride with confidence knowing our meticulously inspected 20 x 4.0 fat bike tubes are perfect replacements for various fat tire bike types, including mountain bikes, commuters, off road bike and E-bike. Enjoy a stable, comfortable, and secure riding experience with our reliable bike tire tube. Please check carefully for the details, PSI and size before purchase.
• EASY TO INFLATE SCHRADER VALVE: Equipped with a standard 32mm Schrader valve, compatible with most rims and can be inflated using regular bike pumps.
• INNER TUBE INSTALLATION NOTICE: When replacing the inner tube, refrain from using sharp tools. employ only designated tools for the replacement procedure. The primary psi safety rating is contingent upon the specifications and model of the tire. When changing a bike inner tube, inflate it slightly to avoid twisting and check that the tire bead is evenly seated on both sides of the rim.