CUB CADET 964-04090A Grass Bag RZT L/S Twin Rear Triple Rear 54" Deck Lawn Mower Baggers

What It Is

This is a replacement grass collection bag for Cub Cadet RZT L/S and similar zero-turn mowers with a 54-inch fabricated deck. It’s designed to catch clippings during bagging operation, not for mulching or side discharge.

Fitment & Compatibility

• Deck size: 54-inch deck only. Will not fit 42, 50, or 60-inch decks.
• Models: Cub Cadet RZT L/S, RZT Twin Rear, RZT Triple Rear series. Also fits some RZT 54 and Z-Force 54 models. Check your model number against Cub Cadet’s fitment list (search “964-04090A fitment” on their site).
• OEM part: This is genuine Cub Cadet, not aftermarket. Should match original bag dimensions exactly.
• Measurement: Bag opening is roughly 10” x 18”. Measure your existing bag opening and mounting bracket spacing before ordering.
• Double-check: Verify your mower uses a single rear bag (not twin bags). This is one bag, not a set.

Key Things to Know

• Quality concerns: 3.4/5 rating with mixed reviews. Some users report thin material that tears at seams after a season. Inspect stitching immediately.
• Installation: Simple swap—remove old bag, slide new one onto the mounting bracket, secure with the spring clip. No tools needed.
• Common gotcha: The bag may not seal perfectly against the discharge chute on older mowers, causing blow-by. Check the rubber flap on the chute for wear.
• Price vs. aftermarket: At ~$70, it’s pricier than some aftermarket options (around $45), but OEM fit is more reliable if your deck is standard.

Should You Buy It

Buy this if you need a direct OEM replacement for your Cub Cadet 54-inch zero-turn and want guaranteed fit without modification. Skip it if you’re on a tight budget or have an older mower with a worn chute—consider an aftermarket bag with a better warranty or a chute seal kit first.