8TEN LawnRAZOR Blade Set for John Deere X300 X304 X320 GX255 GX325 48 inch Deck M145476 M127500 M127673 (High-Lift)

What It Is

This is a set of three high-lift replacement blades for John Deere X300, X304, X320, GX255, and GX325 tractors with a 48-inch deck. Designed for better grass lift and discharge, it’s ideal for mulching or bagging in tall or wet grass.

Fitment & Compatibility

• Deck size: Fits only 48-inch John Deere decks (model numbers M145476, M127500, M127673). Measure your deck width before ordering; 48-inch decks use three blades, each approximately 20.5 inches long.
• Models confirmed: X300, X304, X320, GX255, GX325. Also fits some 48-inch decks on X500 series (e.g., X530, X534) – double-check your deck model number.
• OEM cross-reference: Replaces John Deere parts M145476, M127500, and M127673. Not a direct OEM part, but matches dimensions and mounting hole pattern (5-point star center hole, 1-inch diameter).
• What to check: Verify your current blades have a 5-point star center hole and measure the blade length (tip to tip) – should be ~20.5 inches. Also confirm your deck uses three blades (not two or four).

Key Things to Know

• High-lift design: The curved tips create more airflow for better discharge but increase wear and vibration if the deck is not level or blades are unbalanced. Expect more noise than standard low-lift blades.
• Installation difficulty: Easy – requires a socket wrench (usually 15/16-inch or 5/8-inch) and a block of wood to stop the blade from spinning. No special tools needed, but torque to 30-40 ft-lbs.
• Common gotcha: These blades are thicker than some OEM options – may slightly reduce deck clearance. Check that your deck’s spindle bolts aren’t too short; if they are, use washers or buy longer bolts.
• Quality note: LawnRAZOR blades are heat-treated and coated for rust resistance. Users report they stay sharp longer than budget brands but may need balancing before installation (use a blade balancer).

Should You Buy It

If you own a John Deere X300-series or GX-series with a 48-inch deck and need reliable, high-lift performance for bagging or cutting thick grass, this set is a solid upgrade over OEM blades. It’s not for low-lift mulching or sandy soil (high-lift wears faster there), but for most residential mowing, it’s a great value at $42.95.