964-04117A 664-04117A Lawnmower Grass Bag for MTD Troy Bilt 21" Lawn Mower 964-04117B 664-04011 664-04027 664-04034 Fit TB110 TB210 TB260 TB130 TB230 TB280ES TB280 (Without Catcher Frame)

What It Is

This is a replacement grass collection bag designed for MTD and Troy-Bilt 21-inch walk-behind lawn mowers, including the TB110, TB210, TB260, TB130, TB230, TB280ES, and TB280 models. It attaches directly to the mower’s rear discharge chute to collect clippings during mowing.

Fitment & Compatibility

Before buying, verify your mower’s model number (e.g., TB110, TB230) and deck size—this bag fits only 21-inch decks. Confirm your mower does not have a separate catcher frame; this bag is for models without one. Check the mounting bracket on your mower: the bag uses two hooks and a rear support strap. Measure the bag opening (approx. 12” x 6”) and compare to your chute. This is an aftermarket replacement for OEM part numbers 964-04117A, 664-04117A, 964-04117B, 664-04011, 664-04027, and 664-04034. Not compatible with models that use a rigid frame or side-discharge only.

Key Things to Know

• Quality & durability: Bag is made of woven polyester with a plastic stiffener at the opening. It holds up for several seasons but may tear if overloaded with wet grass.
• Installation: Attach the bag’s two hooks to the mower’s rear bracket, then secure the top strap to the handle. Takes about 2 minutes—no tools needed.
• Common gotchas: If your mower has a separate catcher frame (sold separately), this bag won’t fit. Check that your mower’s rear discharge door opens fully and latches securely—some older models may have a worn spring.
• Capacity: Holds roughly 1.5–2 bushels. For larger lawns, you may need to empty frequently.

Should You Buy It

If you own a compatible 21-inch MTD/Troy-Bilt mower without a catcher frame and need an affordable, direct-fit replacement for a worn or missing bag, this is a solid choice. It’s not heavy-duty for commercial use, but for residential mowing it works well and is easy to install.