Castair Replacement Wheel 7.5X1.5X.5" W7.5x1.5x.5

If you own a portable Castair air compressor — the 8-gallon, 20-gallon, or twin-tank models — and you're dealing with a flat, cracked, or seized wheel, part number W7.5x1.5x.5 is the direct replacement. This is the exact OEM wheel that Castair puts on their portable compressor tanks. It fits the axle, it rolls the same, and it's sourced from the same manufacturer. You're not hunting for a hardware store approximation — you're putting the right part back on. What This Wheel Fits The W7.5x1.5x.5 wheel is listed by Castair directly alongside their portable tank wheel kits, axle bolts, and handles. Based on the part number — 7.5" diameter, 1.5" width, 0.5" bore — this fits the 20-gallon portable tank (part 20P150) and other Castair portable compressor configurations that use the same axle diameter. Castair sells complete tank kits that include wheels, axle, handle, and vibration pads (for example, 20P150C). When one wheel goes bad on an otherwise solid unit, replacing the whole tank assembly makes no sense. This part lets you keep a functioning compressor in service with a low-cost repair instead of scrapping the unit. Wheel Specifications Part Number: W7.5x1.5x.5 Diameter: 7.5 inches Width: 1.5 inches Bore (axle hole): 0.5 inches (1/2") Manufacturer: Castair (OEM replacement) Compatible Axle Bolt: AB34 (3/4" axle bolt for 20-gallon portable); AB12 (1/2" for 8-gallon) Castair Portable Tank Wheel and Handle System Castair's portable compressor tanks use a simple, serviceable axle-and-wheel arrangement. The full parts list from their tanks page gives you everything you need to understand the system: W7.5x1.5x.5 — 7.5x1.5x0.5" wheel (this part) W10x1.5x.5 — 10x1.5x0.5" wheel (larger diameter option) W10x3x.75 — 10x3x0.75" wheel (wide, heavy-duty option) 3432013 — Handle for 20-gallon portable 3432008A — Handle set for 8-gallon twin-tank AB12 — Axle bolt for 8-gallon portable (1/2") AB34 — Axle bolt for 20-gallon portable (3/4") AT34 — Axle for twin-tank configurations If your wheel is damaged because the axle bolt sheared or bent, order the axle bolt at the same time. Running a portable tank on a bent axle will destroy the replacement wheel just as fast as whatever damaged the original. What's in the Box 1x Castair replacement wheel, 7.5" x 1.5" with 0.5" (1/2") bore The axle bolt is sold separately. Order AB12 or AB34 depending on your tank model if the axle is also damaged. When Does a Shop Need This vs. Stepping Up or Down You need this part when: Your Castair portable compressor has a cracked or worn wheel and you want to restore mobility without scrapping the unit You're rebuilding a used Castair portable tank that's otherwise in good shape You keep a portable compressor moving around the shop and want a spare wheel on hand Step up to the W10x1.5x.5 or W10x3x.75 if you're moving the compressor over rougher surfaces regularly or need more ground clearance. The 10" wheels roll easier on uneven concrete and handle ramps better. The 7.5" wheel is the standard OEM size for most Castair portable tanks and is the right choice for normal shop floor use. This part does not apply to stationary Castair compressors — industrial, commercial, or duplex series units sit on vibration pads, not wheels. Technical Specifications Part Number: W7.5x1.5x.5 Diameter: 7.5" Width: 1.5" Bore: 0.5" (1/2") Application: Castair portable air compressor tanks — 20-gallon portable (20P150) and compatible models OEM Part: Yes — listed directly on Castair's tank and wheel parts page Why Buy From Air Compressor Factory Direct? We have been stocking and selling Castair parts and compressors since 2016. We carry the full line — compressors, pumps, tanks, and all the service parts that keep them running. When you order a wheel here, you get the OEM Castair part number, free shipping, and a team that knows the lineup. If you're not sure whether the W7.5x1.5x.5 is the right size for your specific tank model, call us — we can look it up by your unit model number and confirm before you order. We stock axle bolts, handles, vibration pads, and the other portable compressor accessories alongside this wheel, so you can get everything for a complete repair in one order. Call 866-217-0063 for quick answers and help!