Hey! If you're thinking about using the 8TEN LawnRAZOR Mower Blade for mulching leaves, it generally does a pretty good job. It's built with mulching in mind and works with a bunch of different mowers like MTD, Cub Cadet, and Troy Bilt, according to the manufacturer's description.

The blade is about 20 3/4 inches long and 2 1/4 inches wide, which seems to help it cut leaves nicely. From what we've seen, it gets a lot of positive feedback for mulching grass well.

One thing to keep in mind is that some folks found it wasn't super sharp right out of the box. It might help to give it a quick sharpen yourself to get the best results. A few people said it made a big difference in performance after they did that.

As for fitting, it seems to work well for most, but a few mentioned it didn't match up perfectly on smaller or less powerful mowers, which can slow things down.

But once you have it on and sharpened, it appears to be really effective in keeping your lawn looking neat throughout leaf season.

Overall, if you're up for a bit of prep work, it could be a solid pick for mulching leaves on your lawn!

Yeah, based on what we found, the 8TEN LawnRAZOR Mower Blade should fit Troy-Bilt 21' mowers. While it was highlighted for the Cub Cadet CC999ES, both the manufacturer's description and some feedback indicate it works with various brands, including Troy-Bilt.

The blade itself is 20 3/4 inches long, 2 1/4 inches wide, and has a center hole diameter of 11/16 inches.

I'd suggest you compare these details with your current mower blade just to make sure everything checks out with your specific Troy-Bilt model. It's always smart to double-check since there can be slight differences in models.

As for how it performs, folks generally like the 8TEN LawnRAZOR for its mulching and cutting prowess. It's seen as pretty efficient and reliable for keeping your lawn nice.

Just a heads up, though—some noticed it wasn't super sharp out of the box. This might be because of a powder coating applied to protect it during shipping.

If it seems a bit dull at first, a quick manual sharpening should get it to peak performance faster. Once sharpened, it seems to make clean cuts and leaves the lawn looking great.

All in all, for a Troy-Bilt 21' mower, this blade should work, provided the model is listed as compatible. A bit of manual sharpening might be needed for it to work at its best, so you should keep that in mind.

Otherwise, it seems like a solid choice for your mower.

The 8TEN LawnRAZOR Mower Blade is designed for several mower models like MTD, Cub Cadet, and Troy Bilt, making it a versatile option.

It's especially aimed at mulching, where it’s supposed to chop grass finely to help with lawn tidiness and soil health.

Now, about how sharp it is right out of the box—our research shows mixed reactions. The manufacturer's description sets high expectations, but some feedback mentions that the blade might come with a powder coating. This coating can slightly dull its sharpness initially, and for the best cutting experience, it seems the coating needs to wear off first.

A few people actually prefer to sharpen the blade before they even use it, just to get it performing at its best more quickly.

So, you might find it helpful to give it a quick sharpening yourself if it doesn't seem sharp enough from the get-go.

You might also want to consider how this blade matches with your mower's engine power. There's some feedback suggesting that it might be a little demanding on less robust motors, which can lead to slower mowing or even stalling in some cases.

All in all, it could be worth double-checking that your mower's model and engine power are suitable for this blade. This makes sure everything runs smoothly from the start.

And if needed, a quick sharpening might save you some effort down the line and get you the great lawn results you’re hoping for.