Parts Camp GX21784 Toothed Mulching Lawn Mower Blade Replace John Deere GY20852, AM141035, GX21786 for 48 in. Cut John Deere 145, 155C, LA130, LA140, LA145, LA155, LA165 Tractors 3 Pack

What It Is

This is a 3-pack of toothed mulching blades designed to replace OEM John Deere parts GY20852, AM141035, and GX21786. They fit 48-inch cutting decks on select John Deere lawn tractors, including the 145, 155C, LA130, LA140, LA145, LA155, and LA165 models.

Fitment & Compatibility

Before buying, confirm your mower deck is exactly 48 inches wide and uses a 5-point star center hole with a 0.5-inch diameter. Measure your current blade length – these are 16.75 inches long. Cross-reference your OEM part number: if your deck uses GY20852, AM141035, or GX21786, these will fit. They are aftermarket replacements, not OEM John Deere parts, so verify the blade thickness (0.25 inches) matches your spindle clearance. Check that your deck is compatible with toothed mulching blades (some decks require standard lift blades for bagging or side discharge).

Key Things to Know

• Quality: At $29.99 for three blades, they’re budget-friendly. Check reviews for durability concerns – only 2 reviews at 4.0 stars suggest limited long-term feedback.
• Installation: Straightforward if you’ve replaced blades before. Use a torque wrench to tighten the center bolt to 45–55 ft-lbs. Mark the blade orientation before removal.
• Common gotcha: Toothed mulching blades require sharp edges to cut grass finely. If your deck is used for bagging or side discharge, these may not perform as well as standard lift blades.
• Pack size: Three blades give you a spare set. Replace all three at once for balanced cutting.

Should You Buy It

This is a solid choice if you own a 48-inch John Deere LA-series or 100-series tractor, want a low-cost mulching blade set, and don’t need high-end durability for commercial use. Skip it if you prefer OEM parts, need blades for bagging, or have a different deck size.