GX21380 Medium Lift Mower Blade, Compatible with John Dee re 54" Deck G110 D170 190C LA150 LA175 E180 S180 Riding Lawn Tractor, Replace GY20679 GY20684 GY20686, 3 Pack

What It Is

The GX21380 is a medium-lift mower blade set (3-pack) designed for 54-inch cutting decks on select John Deere riding lawn tractors. It’s intended for residential mowing of medium-height grass, providing a balance between cutting performance and bagging efficiency.

Fitment & Compatibility

• Deck size: Only fits 54-inch John Deere decks. Measure your deck width before ordering.
• Compatible models: G110, D170, 190C, LA150, LA175, E180, S180 (and similar 54" deck tractors). Check your model number against the list.
• OEM replacement: Replaces OEM part numbers GY20679, GY20684, GY20686. These are aftermarket blades, not genuine John Deere.
• Measurements: Blade length is 21 inches; center hole diameter is 1 inch. Confirm your existing blade dimensions match.
• Mounting hardware: Blades only—no washers or bolts included. Reuse your original hardware or buy separately.

Key Things to Know

• Medium lift vs. high/low: Medium lift works for most residential mowing but may clog in thick, wet grass. Use high-lift for better bagging, low-lift for dry conditions.
• Installation: Easy DIY job with a socket wrench. Torque blade bolts to 70–90 ft-lbs. Use thread locker if bolts are worn.
• Quality: Aftermarket steel—sharp out of box but may dull faster than OEM. Check for balance before mounting; some users report slight imbalance.
• 3-pack value: Good for replacing all three blades at once, saving time and shipping cost vs. singles.

Should You Buy It

If you own a compatible 54-inch John Deere tractor and want an affordable 3-pack for routine blade swaps, this is a solid budget pick. It’s not for commercial use or heavy-duty conditions, but for average lawn care at $10.86 per blade, it’s hard to beat. Verify your deck size and model first—fitment is specific.