20x4.0/4.9 Fat Tire Bike Inner Tubes AV 32mm Valve

Updated September 17, 2026

ASIN: B0CZRW8CTQ Brand: NiuJKun Condition: New In Packaging?: Yes Assembly Required?: N/A Damaged?: No Functional?: Yes Missing Parts?: No Model: NiuJKun VERSATILE COMPATIBILITY: Designed for 20-inch x 4.0/4.9 fat tires, our AV Schrader valve inner tube is perfect for mountain bikes, gravel, city and electric bikes, offering seamless fit and functionality. HIGH QUALITY FAT TIRE TUBE: The bike tube is made from premium butyl rubber. better air tightness, durable and shock absorption. No bumps will be felt, No bumps will be felt, advanced 20x4 bike tube adds comfort riding, Must be your best choice. ENHANCED RIDING EXPERIENCE: Our 20in x 4.0/4.9 inner tube is designed to improve overall ride quality by providing better shock absorption and tire stability, ensuring a smoother and more enjoyable journey on your bike. 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. After installment, please check the tube is at the right position between steel and tire, make sure the tubes are not clamped by them; Then inflate the air according to pressure standard of tire. IMPORTANT NOTE: Before purchasing a new inner tube, please ensure the size of the old bicycle tire diameter and width, to ensure compatibility and reliability during installation.

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