PARTS UNLIMITED Standard Inner Tube for 21" Wheels

Upgrade your motorcycle's reliability with the PARTS UNLIMITED Standard Inner Tube, engineered specifically for 21" wheels. This high-quality 21 inch motorcycle inner tube is crafted from 100% pure butyl polymer, ensuring superior air retention and long-lasting performance on any ride.

Description

Experience unmatched dependability with this premium butyl inner tube, designed for the demanding conditions of motorcycle riding. Unlike other tubes that blend butyl with natural rubber, this genuine butyl construction minimizes natural air leakage, maintaining consistent tire pressure for extended periods. This not only enhances safety but also reduces the frequency of inflation, allowing you more time on the road. With a robust 2.0 mm thickness, this standard motorcycle tube is built to withstand the rigors of the road, offering excellent resistance to punctures and abrasions for peace of mind on every journey. It's suitable for both front and rear wheel applications on 21" rims, making it a versatile choice for a wide range of motorcycles. Compatibility extends to tire sizes including 2.75-21, 3.00-21, 80/100-21, 90/100-21, 90/90-21, and 100/80-21. The integrated TR-4 (Round Base) valve stem, featuring a center metal valve with threading and nuts, ensures secure inflation and straightforward maintenance, making this TR-4 valve stem tube a reliable component for your motorcycle's wheels.

Features & Highlights

• Superior Air Retention: Crafted from 100% pure butyl polymer, this inner tube significantly minimizes natural air leakage, ensuring your tires maintain optimal pressure longer than tubes made with blended materials.
• Enhanced Durability: With a robust 2.0 mm thickness and genuine butyl construction, this tube offers excellent resistance to punctures and wear for reliable, long-term performance across various riding conditions.
• Universal 21" Fitment: Designed to fit a wide array of 21" motorcycle wheels, this tube is compatible with numerous tire sizes (e.g., 2.75-21, 90/90-21) and suitable for both front and rear applications.
• Secure TR-4 Valve System: Features a durable TR-4 (Round Base) metal valve stem with threading and nuts, providing a secure seal and hassle-free inflation and maintenance.
• Effortless Identification: Each inner tube is individually packaged with comprehensive sizing and valve stem type information clearly marked on the box, simplifying selection and storage.

Technical Specifications

• Duty: Standard
• Type: Motorcycle
• Material: 100% Butyl Polymer
• Rim Diameter: 21"
• Tube Thickness: 2.0 mm
• Mounting Position: Front/Rear
• Tube Fits Tire Sizes: 2.75-21, 3.00-21, 80/100-21, 90/100-21, 90/90-21, 100/80-21
• Inner Tube Valve Stem Type: TR-4 (Round Base), Center Metal Valve (Threaded/Nuts)

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