618-06981 918-06981 Spindle Deck Assembly for Cub Cadet MTD Columbia Troy Bilt 50 inch Deck XT1-LT50 XT2-LX50 CYT5023SE 50" Deck Mower (3 Packs)

What It Is

This is a 3-pack of spindle deck assemblies designed for 50-inch mower decks on Cub Cadet, MTD, Columbia, and Troy-Bilt lawn tractors. Each assembly includes the spindle housing, shaft, bearings, and pulley, ready to bolt on as a direct replacement for worn or failed spindles.

Fitment & Compatibility

Before buying, verify your mower has a 50-inch stamped steel deck—this part will not fit fabricated or 46/54-inch decks. Compatible models include Cub Cadet XT1-LT50, XT2-LX50, and CYT5023SE, plus MTD, Columbia, and Troy-Bilt equivalents with OEM part numbers 618-06981 or 918-06981. Measure the spindle mounting hole pattern (typically 3.5 inches center-to-center) and pulley diameter (usually 4.5 inches). This is an aftermarket replacement, not OEM Cub Cadet, so check that the spindle shaft diameter (commonly 5/8 inch) matches your blade and pulley.

Key Things to Know

• Quality note: Aftermarket spindles often use sealed bearings that are adequate for residential use but may wear faster than OEM under heavy commercial cutting.
• Installation: Moderate difficulty (1–2 hours for all three). You’ll need a jack, socket set, and torque wrench—tighten spindle bolts to 30–40 ft-lbs. Reuse your original blade bolts if they’re in good shape.
• Gotcha: Some users report the pulley alignment is slightly off compared to OEM, which can cause belt squeak or premature wear. Check belt tension after install and adjust if needed.
• Tip: Replace all three spindles at once even if only one is bad—it saves labor and ensures even cutting.

Should You Buy It

Buy this 3-pack if you own a residential 50-inch MTD-built mower (Cub Cadet, Troy-Bilt, Columbia) and need a budget-friendly, direct-fit spindle replacement for occasional home use. It’s not for commercial operators or those wanting OEM-grade longevity, but for the price, it’s a solid value if you’re handy. Skip it if you have a different deck size or want guaranteed OEM fit and durability.