2 Pack GY21098 Spindle Assembly with GX20367 Spindle Pulley GX20072 Belt 1/2x103 for John Deere D100 D105 D110 D120 D125 D130 E100 E110 E120 E130 LA100 LA105 LA110 Lawn Tractor

What It Is

This is a 2-pack replacement spindle assembly kit for select John Deere lawn tractors, including the pulley (GX20367) and a 1/2x103-inch drive belt (GX20072). It’s designed to restore the blade drive system on 42-inch and 48-inch cutting decks, typically for residential mowing.

Fitment & Compatibility

Before buying, verify your tractor model and deck size. This kit fits John Deere D100-D130, E100-E130, and LA100-LA110 series—but only with 42-inch or 48-inch decks. Check your deck’s part number (stamped on the deck housing) and confirm it uses OEM-style spindles (GX21098). Measure your existing belt length: it must be 1/2-inch wide by 103 inches long. If your deck uses a different belt or spindle design (e.g., some 54-inch decks), this won’t work. This is an aftermarket kit, not John Deere OEM, so confirm the pulley matches your deck’s spindle bolt pattern (usually 3-bolt).

Key Things to Know

• Quality: Rated 4.6/5 (47 reviews). Users report solid durability for residential use, but some note the pulleys may be slightly noisier than OEM.
• Installation: Moderate difficulty. You’ll need a socket set, jack, and possibly a puller for stubborn spindles. Expect about 1-2 hours.
• Gotchas: The belt included is a standard replacement—check your deck’s belt routing diagram. Spindle bearings are sealed, so no greasing required, but ensure the deck is level after installation to avoid uneven cutting.
• Compatibility: Double-check the spindle housing height; some aftermarket spindles may be slightly taller, affecting blade clearance on lower deck settings.

Should You Buy It

This is a cost-effective choice for DIY owners of compatible John Deere tractors with 42-inch or 48-inch decks who need to replace worn spindles and belt together. It’s not for commercial use or odd deck sizes, but for residential mowing, it offers good value and reliable performance at a lower price than OEM parts.