The Super Lite XL are the larger versions of the SL Super Lite wheels modelers have known for years. The Super Lite XL are available in 4, 4.5, 5, 5.5 and 6 diameters. These tires are very durable and are mounted on a molded hub that captures the tire to avoid any roll off. The smooth tread and rounded edge provide a great ride for your aircraft and the material they are made from offers low bounce and super light weight ! These are great upgrades for some ARFs that offer less desirable wheels or for a scratch build that needs to save every ounce possible. All packages are (2) wheels per package. Size and information: *All wheel widths are 1.18 (30mm) and all axle dia. are 5/32 (4mm) that can be drilled out to 1/4 (7mm) if needed. 500SLX - 5 (127mm) Diameter - Weight: 1.8 oz / 51.0 g