964-04117A Lawnmower Grass Bag Replacement for Troy Bilt 21" Lawnmower Bag 964-04117B, 664-04117A, for Models TB210 TB260 TB280ES TB130 TB230 TB280(Without Grass Catcher Frame)

What It Is

This is an aftermarket replacement grass bag (964-04117A) designed to catch clippings on 21-inch Troy-Bilt walk-behind mowers. It fits models without a separate grass catcher frame, including TB210, TB260, TB280ES, TB130, TB230, and TB280.

Fitment & Compatibility

Before buying, confirm your mower has a 21-inch cutting deck and does not use a grass catcher frame (this bag attaches directly to the mower’s rear discharge chute). Check your model number on the mower’s ID tag (under the fuel cap or on the frame). Compatible OEM part numbers: 964-04117B, 664-04117A. Measure the bag’s mounting opening (approx. 8.5 x 6 inches) and compare to your mower’s chute. Not for self-propelled models with a frame-mounted bag system.

Key Things to Know

• Quality vs. OEM: Users report thinner material and stiffer zippers than Troy-Bilt originals; may wear faster with heavy use.
• Installation: Simple – slide bag onto rear chute and hook the top bracket. No tools needed.
• Capacity: 1.5–2 bushels, typical for a 21-inch mower. Bag may fill quickly on tall or wet grass.
• Common gotcha: Bag can detach if the chute hook isn’t fully seated. Double-check it clicks into place.

Should You Buy It

This is a budget-friendly option if your original bag has ripped or lost its zipper and you don’t want to spend OEM prices. It works fine for light-duty residential mowing on dry, short grass. For heavy use or wet clippings, consider an OEM bag with thicker fabric and better zipper durability.