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

What It Is

This is an aftermarket grass collection bag designed for Troy-Bilt 21-inch walk-behind mowers. It replaces OEM part numbers 964-04117A, 964-04117B, and 664-04117A, and fits models including TB210, TB260, TB280ES, TB130, TB230, and TB280. It is sold as a bag-only replacement—no grass catcher frame is included.

Fitment & Compatibility

Before buying, verify three things:

1. Deck size: This bag is for 21-inch mower decks only. It will not fit 20-inch or 22-inch models.
2. Frame requirement: This bag requires a separate grass catcher frame (often sold with the mower or as an accessory). If your mower didn’t come with a frame, or if the frame is broken, this bag alone won’t work.
3. Model number check: Confirm your mower’s model number (not just the series name) against the listed models. Some TB series mowers (e.g., TB200, TB240) use different bag mounts. The bag’s clip type and attachment points match the OEM design, so it should clip onto the frame the same way.

Measurements: The bag is approximately 18" x 10" x 10" (filled height around 14")—similar to OEM dimensions.

Key Things to Know

• Quality varies: At 3.8 stars, some users report the bag is thinner than OEM and may not hold up as long under heavy use. The zipper and seams are the weak points.
• Installation is easy: No tools needed—just snap the bag onto your existing frame. It should click into place the same way as the original.
• Common gotcha: The bag may not seal perfectly against the mower deck, leading to minor grass blow-by. This is typical for aftermarket bags and rarely affects collection performance significantly.
• Not for bagger systems: This is a single rear bag, not a side-discharge or dual-bag system. It mounts directly behind the mower.

Should You Buy It

If you need a quick, low-cost replacement for a worn-out OEM bag and already have a functional frame, this is a reasonable choice. It’s not built to last as long as the original, but for light-to-moderate use on a single lawn, it will get the job done. If you mow large areas or want maximum durability, consider spending more on an OEM bag.