GY20852 AM141035 GX21784 GX21785 AM137757 48" High Lift Mower Blades, Compatible with 48" John Dee re145 155C D140 D150 D160 LA130 LA140 LA145(3pack)

What It Is

This is a 3-pack of 48-inch high-lift mower blades designed to replace OEM part numbers AM141035, GX21784, GX21785, AM137757, and GY20852. High-lift blades create stronger airflow to improve grass clipping discharge and bagging performance, ideal for dense or wet grass on residential John Deere lawn tractors.

Fitment & Compatibility

• Deck size: Only fits 48-inch cutting decks. Measure your deck width (blade tip to tip) to confirm.
• Model check: Compatible with John Deere D140, D150, D160, LA130, LA140, LA145, and select 100-series (e.g., 155C). Not for 42-inch or 54-inch decks.
• OEM vs aftermarket: Aftermarket. Designed to match original specs but not John Deere branded. Check blade length, center hole diameter (typically 1-inch), and thickness (about 0.25 inches) against your current blades.
• Other models: Also fits some older 48-inch decks on RE145, 155C. Verify using your deck model number (stamped on the deck housing).

Key Things to Know

• Installation difficulty: Easy with basic tools (socket wrench, jack or ramps to lift mower safely). Always disconnect spark plug first.
• Torque spec: Tighten blade bolts to 70-80 ft-lbs. Over-tightening can strip threads; under-tightening risks blade detachment.
• High-lift trade-off: Better bagging and discharge, but slightly more engine load and reduced mulching performance. Not ideal for dry, dusty conditions.
• Balance check: Aftermarket blades may need balancing before install. Use a blade balancer to avoid vibration that can damage spindle bearings.

Should You Buy It

If you have a 48-inch John Deere lawn tractor (D100/LA100-series or similar) and want improved bagging or side-discharge in thick grass, this is a solid budget-friendly upgrade. Not for mulching-focused users or those with 42-inch/54-inch decks. For the price, it’s a reliable replacement if you verify fitment first.