Internet #203210728

Model #SA-400BH

Store SKU #871123

40 in. Tow-Behind Spike Aerator

  • 40 in. width ensure you have maximum ground coverage
  • Designed to penetrate up to 2 in. in soil
  • Includes a universal hitch that attaches to riding lawn mowers
  • See More Details

Frequently Bought Together


Product Overview

If your lawn experiences moderate foot traffic or if you have heavy clay soil, you may need to aerate. Brinly's 40 in. tow-Behind Spike Aerator loosens soil and permit it's nutrients and water to reach roots. Our durable, heavy duty aerator features 10 galvanized steel stars that perforate the soil up to 2 in. deep. Each 8 in. dia. star rotates independently and continues revolving during tractor turns. The 14-Gauge steel, 110 lb. capacity weight tray allows for weight to be added for maximum penetration in hard soil.
  • Aerate and relieve compacted soil: 10 Tine stars with 8" Diameters each feature 12 spike tips to penetrate soil up to 2" In depth, allowing water, seed, and nutrients to reach the roots. Stars are constructed in galvanized steel to inhibit rusting for continued use season after season.
  • Durable construction: All-steel design with rigid weight tray holds up to 110 pounds of extra weight for maximum soil penetration and depth. Nylon Spacers between each star deliver maximum strength and durability. Tine axle is constructed in 5/8 in. solid steel.
  • Save time on the job: Each 8” diameter star rotates independently and Continues revolving during tractor turns, resulting in fewer passes due to missed areas.
  • Universal Hitch: a single pin, universal Hitch easily attaches to every lawn tractor and most ztrs and ATVs.
  • Simple assembly: includes Manual with parts break down and full pictorial assembly instructions.
  • Made in the USA: Trusted Since 1839, Brinly-Hardy Company has been dedicated to providing quality, durable, and innovative Lawn & Garden Products built in the USA
  • Product Support: Replacement parts orders can be ordered online at Brinly's website or by calling our toll-free number 877-728-8224. The Brinly Customer Service team is available to assist with questions or concerns.
  • For warranty, service parts, or for help at any time, reach out to the Brinly Customer Service team by calling our toll-free number (877-728-8224) or by emailing Replacement parts can also be ordered online at Brinly's website.
  • California residents

Info & Guides

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Assembled Depth (in.)
28 in
Assembled Height (in.)
10.7 in
Assembled Width (in.)
40 in
Clearing Width (In.)
40 in
Maximum Penetration (in.)
Working Width (in.)


Application Type
Lawn Care
Assembly Required
Assembly Required,Zero-Turn Capable
Fits Brands
Fits Brands
Fits Models
All models with rear hitch plate
Hitch Pin
Product Weight (lb.)
25 lb
Riding Mower Features

Warranty / Certifications

Manufacturer Warranty
2 Year

Questions & Answers


Has anyone had any success with using this to loosen up soil? I have an area of weeds/grass that ...

Asked by MM May 13, 2020

Use when the ground is damp and add some real weight on top of it. But all it does is make punctures in the ground not like a tiller. Look for a Mantis Tiller or something like it. Always check the estate sales in your local merchandizer to see what is offered. I've seen full size tillers go for less than $100.

Has anyone tried using on gravel drive way to break up ice?

Asked by Willitwork March 16, 2020

I am sure with additional weight added to hold it down that the process would make some impact on breaking up ice on a gravel driveway. Of course you might as well just scrap the Spike Aerator afterwards as you have totally defeated the purpose for what it was designed for. The spikes are not made to puncture gravel, rock, concrete or hard soil and will end up being bent and damaged thus when you want to do what it was designed for, aerating your yard it will not work efficiently. Great unit if used properly.

Is this product already assembled and ready for use?

Asked by Poppee March 14, 2020

Comes in a box and you have to assemble it. Quiet easy to put together, just watch your fingers on the blades as they are pretty sharp.

Does this help with seeding or do i need a plug attachment?

Asked by Bb March 5, 2020

Yes, I used it to seed and to fertilize my lawn.

is assembly required

Asked by paul September 11, 2019

No, some assembly is required.

What are the spikes made of

Asked by matthew June 3, 2019

Spike assembly is 1/8 inch [approx] stamped steel . 12 spikes @ 2 inch length per assembly , 10 total assemblys.

How much weight do you need to put on it or blocks or what you put on it as weigths

Asked by Joe March 15, 2019

I use 2 8X8X16 cement blocks

Is this compatible with any riding mower?

Asked by Chewgates November 9, 2018

Should be. It worked with my craftsman.

Will the Brinly-Hardy Tow-Behind Spike Aerator harm irrigation system sprinkler heads fhat are flush with yard surface ?

Asked by sprinklersaeration April 15, 2018

Yes and no. Depending on the weight you put on the aerator it may damage the sprinkler heads or damage the tines. I put flags on the sprinkler heads to avoid the possibility of damaging heads or tines.

What diameter is the pin that attaches to the tractor hitch? Need to make sure it will go throug...

Asked by Rocksister July 27, 2017

Pin comes with unit ,1/2 inch dia. Length is 2-3/4 inch. Hitch gap is 7/8 inch. The gap to the pin edge is 2 inches.

40 in. Tow-Behind Spike Aerator - page 2

Customer Reviews

  • 3.8
    out of 241 reviews
  • 76% recommend this product
Filter by:
Showing 1-10 of 241 reviews
Easy to Assemble
My riding lawnmower used this very efficiently and I was able to strap on 2 cement blocks to add weight to it. It worked effortlessly but it was difficult making too tight a turn. The spike seemed to pierce the ground deep enough, about 2 inches. I'll have to wait to determine the impact it had by watching the sod grow.
by Gene
Poor product
I have used this on my yard now 3 different times and each time I have to stop and bend back the spikes. Not very good quality
by Yard man
First, I'd like to thank all of the previous reviewer's for their comments. Based on what they sa...
First, I'd like to thank all of the previous reviewer's for their comments. Based on what they said, I ordered the aerator, knowing that I'd have to modify it to make it usable in real life. So as soon as I got it, I added angle iron across the tray & down to the shaft ends, plus an enclosure for the weight tray (see attached pic - enclosure ends removed). After doing these mod's, I used it on my lawn w/ 100 lbs in the tray & it worked great - no issues w/ the structure bending. I also did away w/ the silly square plastic shaft bushings, as this was the next weak link. Anyway, the tines are nice & sharp & after these mod's, it did a great job.
by Brad
14 people found this helpful
Not bad but
Bought for the price and because it was convenient at the time. Easy to put together. Wished it would hold more weight. I maxed it at the 110 lbs and had to wait for a good rain for it to penetrate good, which it did. Having said that I noticed after first use the end panels bending out which caused tine bearings to start to separate, and I had made sure everything was tight before I used it. I fabricate, repair, and build things for a living so I know all was assembled properly. I added 1 L bracket to each end, (see pic) which upon second use held everything in place nice and tight, no separation of tine bearings. The brackets mounted in the holes that I used for the strap to hold blocks the first time. The brackets I mounted as it worked out, had another hole that actually made it easier to hook straps. So with a little re-engineering, it worked fine.
by Fixer
14 people found this helpful
OK. Excited. Assembly went well. Seems like strong steel and construction.  Fairly easy assembly.  Nice sharp spikes.  Bolted to my mower and off I go with a 100lb weight (close to max). Looking good.  Get to an elevation in the lawn and the side members that hold the weight off the spikes bends to 45 degrees.  The G-clip at the end of the rod that holds the spikes on falls off and it is gone.  Game over... Now.  I take unit apart.  Painstakenly bolt in angle brackets to these uprights, reapply the G-clips and I'm back in business.  An obvious flaw that could be fixed with a simple change.   Warranty probably no good now. Happy with product overall after changes. 
by Speedking
5 people found this helpful
40 in. Tow-Behind Spike Aerator
I bought this after reading some reviews. I figured for the price it was worth giving it a shot. Picked it up at my local Home Depot. Took it home and in 25 minutes had it together. Hooked it up to my riding mower and the thing worked great. Easy to put together. Easy to use. For the price it did a pretty good job on the yard. Worth the price if you want to aerate the lawn with out paying for a more expensive tool..
by TxTony
15 people found this helpful
40″ Spike Aerator | SA-400BH
Great product. Easy to assemble, use and operate. Best product for the money !
by MartinG
Works well pretty easy assembly...
Works well pretty easy assembly
Response from BrinlyCustomerServiceJan 4, 2021
Thank you so much for your feedback! Please don’t hesitate to reach out to our Customer Service team at 877-728-8224 or at if you have any questions or concerns. Brinly
Perfect size for what I wanted...
Perfect size for what I wanted
Response from BrinlyCustomerServiceJan 4, 2021
Thank you so much for your feedback! Please don’t hesitate to reach out to our Customer Service team at 877-728-8224 or at if you have any questions or concerns. Brinly
40 inch spike aerator used for overseeding
[This review was collected as part of a promotion.] I bought this wonderful aerator back in August 2020. I used it to aerate my lawn in three directions as a prelude to overseeding. My lawn had been about 95% destroyed from necrotic ring. The tines are spaced very well - just perfect for overseeding. The tray was loaded with 16 bricks so that the depth of cut was just perfect. For best results, use this aerator after a good rain or proper irrigation.
by acreguy
Showing 1-10 of 241 reviews