CALPALMY 20x4.0 Fat Tire Bike Inner Tubes - Heavy-Duty Butyl Rubber Tubes with 32mm Schrader Valve - Fit for Electric Bikes, Mountain, Off-Road & Beach Cruiser 20 inch Fat Tire Bicycles (2 Pack)

Features

• Designed to Fit 20 x 4.0 Fat Tire Bikes: Precisely sized for 20 x 4.0 inch fat tire bikes, these inner tubes support tire widths from 3.5" to 4.0", making them a perfect fit for electric fat tire bikes, mountain bikes, beach cruisers, and off-road e-bikes. Whether for daily commuting or trail adventures, enjoy a secure and stable ride.
• Premium Butyl Rubber for Long-Lasting Durability: Engineered from thickened, heavy-duty butyl rubber, these 20-inch fat bike inner tubes provide superior resistance against punctures, tears, and heat. The airtight structure ensures steady inflation, while the flexible material improves tube longevity—perfect for rugged terrain and high-mileage use.
• Enhanced Shock Absorption & Ride Stability: Ride smoother and safer with advanced shock-dampening performance. Our fat bike tubes cushion impacts from bumps, curbs, and rough trails, reducing vibration and improving overall tire contact with the ground—ideal for both high-speed rides and uneven terrain.
• Universal Schrader Valve – Easy to Inflate & Maintain: Each tube features a standard 32mm Schrader valve for effortless inflation with any standard bike pump. The reinforced valve stem provides extra durability, ensuring an airtight seal for fat tire bikes used on pavement, sand, or snow.
• Smart Installation Tips for Best Performance: Before inserting the tube, slightly inflate it to help maintain shape and avoid pinching. Always use proper tire levers—not sharp tools—to prevent accidental damage. For safety, confirm your tire’s PSI rating and make sure the tube bead is evenly seated on both rim sides during installation.