Husqvarna 576588602 Wheel Assembly, Wide, RZ 4621 5424 5426 4221 4824

What It Is

The Husqvarna 576588602 is a wide rear wheel assembly designed for zero-turn mowers. It supports the machine’s weight and provides traction, specifically for residential and light commercial mowing.

Fitment & Compatibility

This wheel assembly fits Husqvarna zero-turn models including the RZ 4621, 5424, 5426, 4221, and 4824. Before buying, verify your mower’s model number (found on the chassis or under the seat) and confirm it matches one of these. Measure your current wheel’s diameter and axle hole size—this assembly uses a 1-inch axle bore and a 13-inch tire. If your mower has a different axle size or uses a non-Husqvarna hub pattern, this won’t work. It’s OEM Husqvarna, so it’s a direct bolt-on replacement for factory wheels.

Key Things to Know

• Build quality: OEM part with a steel rim and pneumatic tire; more durable than many aftermarket options.
• Installation: Simple swap—remove the cotter pin and washer, slide off the old wheel, and reverse the steps. No special tools needed.
• Common gotcha: The tire is pre-mounted and inflated, but you may need to adjust air pressure (around 15-20 PSI) for even wear. Also, check that your axle keyway is clean to avoid wobble.
• Price point: At ~$100, it’s pricier than generic wheels but matches factory specs exactly, reducing fitment risk.

Should You Buy It

If you own a compatible Husqvarna RZ model and need a direct, hassle-free replacement that maintains original performance, this is a solid buy. It’s best for users who want OEM reliability over saving a few dollars on a generic wheel. If you have a different brand or an older Husqvarna model not listed, measure carefully or look for a universal alternative.