48" Deck Replacement Lawn Mower High Lift Blades for M145476 M127500 M127673 UC22009 - Compatible with John Deere GX255 GX325 X300 X304 X320 Lawn Mower - 3 Pack

What It Is

This is a 3-pack of aftermarket high-lift replacement blades for 48-inch cutting decks, designed for John Deere select series lawn tractors and compatible with OEM part numbers M145476, M127500, M127673, and UC22009. High-lift blades create stronger airflow for better grass discharge and bagging performance.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: Your mower must have a true 48-inch cutting deck. Measure deck width if unsure—this won’t fit 42-inch or 54-inch decks.
• Model fit: Listed for John Deere GX255, GX325, X300, X304, X320. Also fits some X500 and X700 series with 48-inch decks, but double-check your specific model’s blade part number.
• OEM cross-reference: These match John Deere OEM numbers M145476, M127500, M127673, and UC22009. Use those to confirm compatibility on your mower’s parts diagram.
• Center hole: Standard 7/8-inch center hole and 2.5-inch diameter blade mounting plate—common for JD 48-inch decks.

Key Things to Know

• Quality vs OEM: At ~$10.60 per blade, these are budget aftermarket. Expect thinner steel than OEM John Deere blades; they may dull faster or bend on rocks.
• Installation: Straightforward swap—use a 5/8-inch socket for the blade bolts. Torque to 30–40 ft-lbs. Mark blade orientation before removal to avoid re-installing upside down.
• High-lift trade-off: Better bagging and discharge, but more engine strain and louder operation. Not ideal for sandy or dry, dusty conditions (increased wear).
• Balancing: Check each blade for balance before installing. Unbalanced blades cause vibration, deck damage, and poor cut. A simple blade balancer or nail-in-wall test works.

Should You Buy It

Buy these if you need a cheap, quick replacement for bagging or side-discharge on a 48-inch John Deere tractor and don’t mow heavy debris. Skip them if you want OEM durability, mulch regularly, or mow bumpy terrain—invest in thicker, balanced OEM or premium aftermarket blades instead.