Toro Part # 133-8182-03; 21 Inch Atomic Blade Replaces # 109-0854 & # 108-0954-03

What It Is

The Toro 133-8182-03 is a 21-inch atomic blade designed for Toro TimeCutter, Titan, and Super Recycler zero-turn and walk-behind mowers. It uses a high-lift, curved design to create superior vacuum for bagging and mulching dense grass.

Fitment & Compatibility

• Deck size: 21-inch cut only. Measure your deck width before ordering—this blade will not fit 22-inch or larger decks.
• Model check: Fits Toro TimeCutter SWX, Titan ZX, and Super Recycler series (check your model number against Toro’s parts lookup). Not for older 2-cycle or push mowers.
• OEM vs aftermarket: This is an OEM Toro blade, so it matches factory specs exactly. Aftermarket “atomic” blades may vary in thickness or hole alignment—stick with OEM for guaranteed fit.
• Replaces: #109-0854 and #108-0954-03. If your mower originally used one of those, this is the direct upgrade.
• Measurements: Center hole diameter is 1”, with a 5-point star pattern. Verify your spindle’s bolt pattern matches—some older decks use a different star or round hole.

Key Things to Know

• Installation: Easy with a socket wrench and blade removal tool (or a block of wood to lock the blade). Torque to 70-90 ft-lbs. Left-hand threads on some Toro spindles—check before turning.
• Performance: Excellent for thick, damp grass; the high lift can throw clippings far, so keep the discharge chute clear. Not ideal for dry, sandy soil—the lift may stir up dust.
• Wear: Atomic blades dull faster than standard flat blades due to the aggressive curve. Inspect after every 10 hours of use; sharpen or replace when the edge rounds.
• Common gotcha: The blade is directional—the curved end must point upward toward the deck. Installing upside down will cause poor cut and vibration.

Should You Buy It

Buy this if you have a compatible Toro zero-turn or Super Recycler and need OEM-grade mulching/bagging performance. It’s a direct, no-guess replacement for the older 109-0854/108-0954-03 blades, and the $24 price is fair for the improved cut quality. Skip it if your deck is not 21 inches or you prefer a low-lift blade for dry conditions.