GY20850 Mower Blades Compatible with John Dee-re D105 D110 D130 S100 E100 E120 E130 Z225 42 Inch Mower Blades, Replaces for GX22151(2 Pack)

What It Is

This is a 2-pack of 42-inch mower blades designed to replace OEM GX22151 blades on John Deere 100-series and select Z225 zero-turn mowers. They’re for standard mulching, bagging, or side-discharge cutting on residential lawns.

Fitment & Compatibility

• Deck size: Only fits 42-inch cutting decks. Measure your deck width (blade tip to tip) before ordering.
• Compatible models: John Deere D105, D110, D130, S100, E100, E120, E130, and Z225 (42" deck). Also fits LA105, LA115, LA125, LA135, and L100/L110/L120/L130 with 42" decks.
• OEM cross-reference: Replaces John Deere GX22151, GY20850, and AM141035. Not compatible with 48" or 54" decks.
• Blade specs: 21.25" length, 2.5" width, 0.25" thickness, 1" center hole, 6-point star drive. Confirm your spindle pattern matches before installing.
• Aftermarket note: These are non-OEM. Fitment is generally good, but minor variations in thickness or balance can occur.

Key Things to Know

• Installation difficulty: Easy—requires a socket wrench and blade removal tool. Torque to 40–50 ft-lbs. Always disconnect spark plug first.
• Sharpness: Come sharp enough for initial use, but expect to sharpen after 5–10 hours of mowing for best cut quality.
• Balance: Some users report slight imbalance out of the box. Check with a blade balancer; file or grind the heavy side if needed.
• Durability: Heat-treated steel, but not as thick as OEM. Fine for residential use on 1–2 acres; may bend on rocks or stumps.

Should You Buy It

Yes, if you have a compatible 42" John Deere and want a budget-friendly replacement for light-to-moderate residential mowing. Not ideal for commercial use or rough terrain where durability matters more. For $27, it’s a solid value if you’re okay with checking balance yourself.