121-5770 Lawn Mower Grass Bag Replacement for Toro Part 161-8188, Compatible with Toro 30 Inch Timemaster Mowers and Model 20199 223CC 20200 20975 20976 21199 21810 (No Mower Frame,30")

What It Is

This is an aftermarket grass bag replacement (model 121-5770) designed to fit Toro 30-inch TimeMaster mowers. It collects clippings during bagging mode and is a direct alternative to the OEM Toro part 161-8188.

Fitment & Compatibility

• Deck size: Only for 30-inch cutting decks (not 22-inch or other sizes).
• Compatible Toro TimeMaster models: 20199, 20200, 20975, 20976, 21199, 21810 (all with 223CC engines).
• OEM cross-reference: Replaces Toro part 161-8188. Does NOT include the mower frame or hardware—just the bag itself.
• Measurement: Bag opening and attachment points match the 30-inch TimeMaster chute. Confirm your mower has the factory bagging adapter (frame) already installed; this bag won’t work without it.
• Check before buying: Verify your mower model number (stamped on frame near engine) and that you have the original bagging frame. If you lost the frame, you’ll need to buy it separately.

Key Things to Know

• Build quality: This is an aftermarket bag—material and stitching may feel lighter than OEM. Some users report seams failing after a season of heavy use.
• Installation: Easy swap—remove old bag, slide new one onto the frame, and secure with the existing hook/strap. No tools required.
• Common gotcha: The bag may not fit snugly on older frames (worn or slightly bent). Check that the frame’s hooks align with the bag’s grommets.
• Low ratings (3.4/5, 3 reviews): Limited feedback suggests durability concerns. If you mow large yards or thick grass, consider OEM for longevity.

Should You Buy It

Buy this if you need a budget-friendly replacement for a worn OEM bag and your frame is in good condition. It’s fine for light-to-moderate use on standard residential lawns. Skip it if you mow frequently, bag wet grass, or want a bag that lasts multiple seasons—spend more on the genuine Toro 161-8188 for better durability.