8TEN LawnRAZOR Mower Blade Set for John Deere 145 155C 48 Inch Deck GY20852 AM141035 GX21784 (Toothed Mulching)

What It Is

This is a set of three toothed mulching blades designed for 48-inch mower decks, specifically to replace OEM blades on John Deere 145 and 155C lawn tractors. The toothed edge helps shred grass clippings finer, improving mulching performance by recirculating clippings back into the turf.

Fitment & Compatibility

Before buying, confirm your deck is exactly 48 inches (measured blade tip to blade tip). These blades fit John Deere 145 and 155C models with that deck size. They replace OEM part numbers GY20852, AM141035, and GX21784. Check your current blade’s center hole diameter (usually 7/8-inch or 1-inch) and overall length (typically 20 inches) to match. Not compatible with 42-inch or 54-inch decks, or non-John Deere tractors without verifying measurements. Always cross-reference your model number and deck size with the product listing.

Key Things to Buy

• Quality: Made from heat-treated steel with a toothed mulching design. Expect durability similar to OEM, but inspect for sharpness out of the box—some users report needing to sharpen before first use.
• Installation: Straightforward if you’ve replaced blades before. Use a socket wrench and block the blade to prevent spinning. Torque to manufacturer specs (typically 70-90 ft-lbs). No special tools required.
• Common gotchas: The toothed edge can clog in wet or tall grass—use only for dry, maintained lawns. Ensure blade orientation matches your deck’s rotation (usually counterclockwise from above). Balance blades after sharpening to avoid vibration.
• Set includes: Three blades, no hardware. Reuse your existing bolts and washers, but replace them if worn.

Should You Buy It

Buy this set if you own a John Deere 145 or 155C with a 48-inch deck and want an affordable toothed mulching blade upgrade for better clipping shredding. It’s a solid value for homeowners who mow dry, short grass and prefer mulching over bagging. Skip it if you need a standard lift blade for bagging or side discharge, or if your deck size varies from 48 inches.