18x5.5 AvTread Aircraft Inner Tube

The AvTread 18x5.5 Aircraft Inner Tube is designed for reliable performance in general aviation, vintage, and experimental aircraft applications. Manufactured to meet the demands of aviation use, this tube is available in multiple valve configurations, including TR15 Straight Valve and TR67 Long Valve Stem, to accommodate a range of wheel and clearance requirements.

AvTread "Leakguard" Inner Tubes are produced using aviation-grade butyl rubber for consistent quality, durability, and air retention. Whether used in tailwheel aircraft, light aircraft, or specialty applications, the 18x5.5 size provides dependable performance under varying operating conditions.

Key Features

• Premium butyl rubber construction for long service life and low air loss
• Precision molding for consistent fit and easy installation
• Multiple valve options available: TR-15 (straight), TR-67 (Long 45°), TR-67 (Long 90°)
• Manufactured to Aerospace Standard SAE AS50141.
• Ideal replacement for 18X5.5 aviation tire tube applications

Selecting a high-quality aircraft inner tube helps reduce maintenance, minimize leaks, and maintain steady pressure for smoother operations. AvTread focuses on uniform wall thickness and reliable sealing to support confident performance in demanding flight conditions.

Commonly used in popular Main Landing Gear on turboprop/business aircraft, and Nose Landing Gear on Larger Business Jets and Military Trainers that specify an 18X5.5 tire, including select Beechcraft King Air 200 series (including IGW), Beech 99, Cessna 337 Skymaster (main gear), TBM, Learjet 20 series, and the Dash 8. Always verify the tire size and valve-stem requirement in your aircraft maintenance manual before installation.

• Confirm tire marking “18x5.5” and match the correct valve stem (TR-15 or TR-67)
• Use a light, aviation-approved talc during install to reduce chafing
• Inflate/deflate cycle once to remove folds, then set final operating pressure per your maintenance manual
• Pair with a quality 18X5.5 aircraft tire for best results

• Check pressure regularly; butyl helps, but temperature and usage affect PSI
• Inspect for valve-core cleanliness and proper cap fit to prevent slow leaks
• Replace tubes when tires are replaced, or at the first sign of aging or damage

FREE Domestic Shipping on AvTread Aircraft Tubes!

18x5.5 AvTread Tube price varies depending on selection above.

Select the right Tire, Tube & Wheel for your sailplane by referencing our Aircraft Inner Tube, Tire & Wheel Selection Guide.

W&W typically stocks 18X5.5 AvTread Tubes.

FAQ - AvTread Aircraft Inner Tubes 18X5.5 (18-5.5)

What aircraft use size 18X5.5 inner tubes?

AvTread 18X5.5 Aircraft Inner Tube is commonly used on the main landing gear of various light-to-mid-size business turboprops and small jets, as well as the nose gear of some larger commuter aircraft. Whether you’re replacing a main or nose wheel tube, this guide lists aircraft models and manufacturers that use 18X5.5 tires. Use the table below and confirm fitment in your POH or maintenance manual before purchasing your next tube.

Aircraft Using 18X5.5 (18-5.5) Inner Tubes