954-05021 42 Inch Deck Belt for Cub Cadet XT1 LT42 LT42KH LT42EFI XT2 LX42 LX42KH Troy-Bilt Super Bronco Super Bronco XP TB42 42" Belt 754-05021 / Aramid Cord Belt / 1/2" × 100.25"

What It Is

This is a 42-inch deck drive belt (1/2" × 100.25") for Cub Cadet XT1, XT2, LX42 series and Troy-Bilt Super Bronco/XP mowers with 42" cutting decks. It transfers power from the engine pulley to the blade spindles.

Fitment & Compatibility

Before buying, confirm three things:

• Deck size: Must be a 42-inch stamped or fabricated deck (not 46" or 50").
• Model series: Verified fits Cub Cadet XT1 LT42, LT42KH, LT42EFI; XT2 LX42, LX42KH; Troy-Bilt Super Bronco, Super Bronco XP, TB42.
• OEM cross-reference: Replaces Cub Cadet 754-05021 and 954-05021. This is an aftermarket Aramid cord belt—not genuine OEM, but dimensionally identical (1/2" wide × 100.25" long).
• Check belt routing: Verify your deck uses a 100.25" belt (some 42" decks use 99" or 101"). Measure your old belt end-to-end (laid flat) or compare part numbers.

Key Things to Know

• Aramid cord vs. Kevlar: Aramid is a strong, heat-resistant synthetic fiber (similar to Kevlar) that resists stretching and snapping under load. It’s a step above standard rubber belts for heavy grass or frequent use.
• Installation difficulty: Moderate. You’ll need to remove the deck or at least the belt cover, and possibly loosen the idler pulley. No special tools, but a belt routing diagram helps (check your manual or online).
• Common gotcha: This belt is slightly longer than some OEM replacements (100.25" vs. 100"). That extra 0.25" can cause slipping if your idler spring is weak—inspect the spring tension before installation.
• Break-in period: Expect slight initial stretching. Re-tension after 1–2 hours of use.

Should You Buy It

If you own a 42" Cub Cadet XT1/XT2 or Troy-Bilt Super Bronco and need a durable, budget-friendly replacement, this belt is a solid choice. It’s not OEM, but the Aramid cord offers better longevity than standard belts for about half the price. Avoid it if you want exact OEM fitment or have a non-42" deck.