5' Competitor 3/8" Blade Pair

What It Is

This is a set of two 5-foot-long, 3/8-inch-thick mower blades from the Competitor brand, designed for heavy-duty commercial or industrial mowing applications. They’re intended for zero-turn mowers or large out-front decks where extreme cutting width and durability are required—not for standard residential lawn tractors.

Fitment & Compatibility

Before buying, verify these exact measurements: the blade length must be exactly 60 inches (5 feet), and the thickness is 3/8 inch. Check your mower’s center hole diameter (typically 1 inch or 20mm) and the drive pin or star pattern—Competitor blades often use a standard 1-inch round center hole with two offset drive pins. Measure your existing blade’s length from tip to tip and the center hole size. These blades are aftermarket, so confirm they match the OEM part number for your specific brand (e.g., Exmark, Scag, John Deere, or Toro commercial models). They will not fit residential decks under 60 inches. Also verify the blade’s air lift design matches your deck’s discharge style (side, mulching, or bagging) to avoid poor cut quality.

Key Things to Buy

• Quality: Competitor blades are typically made from hardened boron steel, offering good wear resistance but may be slightly less durable than OEM high-end options. Expect a balance of cost and performance.
• Installation Difficulty: Moderate—requires lifting the mower safely, removing the deck, and using a torque wrench to tighten blade bolts to manufacturer spec (usually 70-90 ft-lbs). Never overtighten.
• Common Gotchas: The 5-foot length means these blades are heavy and awkward to handle—use a blade removal tool or strap wrench. Check for blade balance after installation; an unbalanced blade can cause vibration and damage spindle bearings. Also, ensure your deck has enough clearance for the blade’s lift; some decks require a specific blade shape to avoid hitting the deck shell.
• Frequent Issue: Some users report that aftermarket blades like these may not have the exact same air lift as OEM, leading to reduced bagging efficiency or uneven cut in wet grass.

Should You Buy It

Buy these if you have a 60-inch commercial zero-turn mower and need a cost-effective replacement for worn OEM blades, and you’re comfortable with basic mechanical work and blade balancing. Skip them if you require exact OEM cut quality for pristine lawns, or if your mower uses a non-standard center hole or drive pattern—then stick with brand-specific blades.