954-04259A Lawn Mower Drive Belt Fits for MTD Cub Cadet Troy Bilt 21 inch Deck SC 700 SP21 TB200 Walk Behind Mower 754-04259 954-04259 754-04259A (3/8" x 34")

What It Is

This is a 3/8" x 34" drive belt (OEM #954-04259A) that transfers power from the engine pulley to the blade spindle on select MTD, Cub Cadet, and Troy-Bilt walk-behind mowers with a 21-inch deck, including the SC 700, SP21, and TB200 models.

Fitment & Compatibility

• Deck size: 21-inch deck only; will not fit 20-inch or 22-inch decks.
• Exact models: Cub Cadet SC 700 (all variants), Troy-Bilt TB200, and MTD SP21. Also fits some Yard Machines and Bolens equivalents.
• OEM cross-references: Replaces 754-04259, 954-04259, and 754-04259A. Confirm your old belt’s part number matches one of these.
• Measure before buying: Belt length must be 34 inches (outside circumference) and width 3/8 inch. Measure your old belt flat, not stretched.
• Aftermarket note: This is a genuine Cub Cadet belt, not a generic. Aftermarket belts with the same measurements may vary in thickness or material—stick with OEM for consistent tension.

Key Things to Know

• Installation difficulty: Moderate. You’ll need to remove the blade, belt guard, and possibly the deck pulley to route the belt. Expect 20–30 minutes.
• Common gotcha: The belt must be routed under the idler pulley and over the engine pulley—reverse order causes slipping or premature wear.
• Durability: OEM belts typically last 2–3 seasons with regular use. Aftermarket belts often fail faster (cracking or stretching) within one season.
• Check pulley condition: Worn or bent pulleys will shred a new belt quickly. Inspect and replace pulleys if they show rust, wobble, or sharp edges.

Should You Buy It

Yes, if you own a compatible 21-inch MTD/Cub Cadet/Troy-Bilt mower and need a reliable, direct-fit replacement. At $11.99 with a strong 4.7 rating, it’s a solid value—especially compared to cheaper aftermarket belts that may not hold tension. Skip it if your mower has a different deck size or if your pulleys are worn; fix those first.