Aeagle 42" Mulching Mower Blades for John Deere L100 Series — 2-Pack, 3-in-1 Mulch/Bag/Side Discharge, Circular Hole

Aeagle 42-inch mulching mower blades replace John Deere GX20249/GX20433 and deliver 3-in-1 cutting performance for mowing, mulching, and bagging on 42" decks.

These Aeagle mulching blades are engineered to be direct-fit replacements for many John Deere L100-series and compatible Sabre/Scotts/ Sabo lawn tractors that use a 42" deck. Built in a circular center-hole pattern and finished in protective paint, the blades combine a curved profile and mulching teeth to chop clippings finely and move them efficiently through discharge or into a bag. The set includes two blades sized to John Deere specifications so you can restore cutting performance and maintain an even finish across the deck.

Will these blades fit my John Deere L100-series lawn tractor?

Yes — these blades are made to match the common GX20249/GX20433 and related part numbers used on many L100 models. They use a circular center hole and measure to the same length, thickness, and hole spacing expected for 42" decks, so they install without modification on compatible machines.

• Compatible John Deere models: L100, L105, L107, L108, L110, L111, L118
• Also fits Sabre/Scotts/Sabo equivalents like L1742 and 1642HS
• Blade length: 21 3/8"; deck size: 42"
• Center-to-center outside hole spacing: 3 5/7"; circular center hole

How do these blades improve mulching, discharge, and bagging?

Aeagle blades are shaped with multiple curvatures and toothed edges to cut and re-cut grass into smaller pieces, which improves mulching and helps clippings pass to the bag or out the side more consistently. The three-in-one profile means you can use the same blade for different tasks without swapping to a dedicated replacement.

• Mulching teeth finely chop clippings for faster decomposition
• Curved profile optimizes airflow for efficient discharge and bagging
• Performs well on heavier growth and light weeds

What are the material, sharpness, and maintenance recommendations?

The blades arrive with a safety paint finish on the cutting edges; this paint will wear off through normal use. The blades are full-thickness steel and can be resharpened when the edge dulls to restore cutting quality. Follow manufacturer torque specs and blade-balance practices to keep vibration low and extend spindle life.

• Cutting edge initially coated with safety paint — wears off with use
• Blade thickness and profile allow safe resharpening
• Rebolt using correct torque and check balance after sharpening

Are there any dimensional details I should verify before buying?

Confirm the blade length, center hole pattern, and hole spacing against your tractor’s existing blades to ensure compatibility. Minor variations in center-hole shape or spacing can prevent correct mounting, so measure the current blade if you are unsure.

• Blade length: 21 3/8" (suitable for 42" decks)
• Air lift height: 1"; width: 2-4/9"; thickness: 1/6"
• Center-to-center outside hole: 3 5/7"; circular center hole shape

Who this is for: Homeowners and small-scale landscapers who run John Deere L100-series or equivalent 42" lawn tractors and want a durable, versatile replacement blade set. Choose these Aeagle mulching blades if you need a plug-and-play 3-in-1 solution that restores cutting performance, handles heavier grass, and supports mulching, side discharge, and bagging without swapping blades.