sanbaiyi 11" Rear Drive Wheels for Toro Lawn Mowers — 2-Pack, 11" x 2-1/8", 1/2" Bore

These are a pair of replacement 11-inch drive rear wheels from sanbaiyi designed to fit a range of Toro lawn mowers and replace part numbers 137-4837, 115-2885, and 119-0313.

When a rear wheel on your lawn mower is cracked, worn smooth, or no longer grips the turf, a direct-replacement pair gets your mower back to reliable traction quickly. sanbaiyi’s two-pack offers molded plastic construction with heat- and aging-resistant properties, sized to match Toro models and hub dimensions so installation is straightforward with basic tools.

Will these wheels fit my Toro mower model?

These rear wheels are manufactured to match the common specifications used on several Toro models. They list compatibility with models such as 20339, 20378, 20959, and 21329, and are intended as replacements for the listed Toro part numbers. Always compare the wheel dimensions and hub bore to your existing wheel to confirm fit before purchase.

• Compatible examples: Toro 20339, 20378, 20959, 21329.
• Replaces parts: 137-4837, 115-2885, 119-0313.
• Check: wheel diameter, width, bore size, and hub length against your mower.

What are the wheel dimensions and material?

Each sanbaiyi rear wheel measures 11 inches in diameter and 2-1/8 inches wide, matching common rear-drive wheel sizing. The hub bore is 1/2 inch with a hub length of 2-1/2 inches. The wheels are molded from durable plastic formulated for resistance to aging and elevated temperatures.

• Diameter: 11 inches; width: 2-1/8 inches.
• Bore: 1/2 inch; hub length: 2-1/2 inches.
• Material: high-quality plastic with aging and heat resistance.

How hard is it to install these rear wheels?

Installation is designed to be simple so most owners can replace the wheels with minimal tools and time. You typically need only a socket wrench to remove the axle nut and slide the old wheel off, then position the new wheel and secure it. Follow your mower manufacturer’s instructions for safety and torque specifications when reinstalling hardware.

• Tools required: usually a socket wrench and the appropriate socket size.
• Process: remove axle nut, slide off old wheel, place new wheel, reinstall nut.
• Tip: verify cotter pin or washer placement and torque to manufacturer spec.

What performance differences should I expect from replacement wheels?

New wheels restore traction, maintain proper cutting height, and reduce wear on the drive system by sitting true on the axle. While plastic wheels are lightweight and corrosion-resistant, they can vary in tread pattern and stiffness compared with OEM items; the sanbaiyi parts are engineered to balance durability with traction for typical residential lawns. Inspect tires for even fit and spin freely after installation.

• Benefit: improved traction and consistent ride height.
• Durability: molded plastic resists rust and UV aging.
• Fit check: ensure free rotation and secure mounting.

Who is this for: homeowners and maintenance technicians who need a straightforward, economical replacement for worn or damaged Toro rear drive wheels. If your mower uses an 11" rear wheel with a 1/2" bore and you see matching part numbers or model compatibility, this sanbaiyi two-pack provides a fast swap to restore mower performance. Ideal for residential lawn care, seasonal tune-ups, and fleet maintenance where standard-fit, corrosion-resistant replacement wheels are required.