John Deere 30-inch Tri-Cycler Mulching Kit - BM17920

Part Number: BM17920
20 Review(s)
John Deere 30-inch Tri-Cycler Mulching Kit - BM17920
John Deere 30-inch Tri-Cycler Mulching Kit - BM17920
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Your Price: $134.81
John Deere 30-inch Tri-Cycler Mulching Kit - BM17920
Usually available
Brand John Deere


John Deere 30-inch Tri-Cycler Mulching Kit

The Tricycler system gets its name from the ability of a John Deere mower to bag, side-discharge, or mulch to meet the three phases of lawn care that are associated with the changing seasons (spring, summer or fall).
The Tricycler mulching attachment allows converting the mower so it can be used to perform the mulching function (grass or leaves) of this system.
The attachment consists of a special mulching blade, a deflector ramp to direct the clippings into the blade for re-cutting, and a discharge closure plate with adjustable baffle.
Operating tips
  • Adjust baffle to the proper opening;.
  • The adjustable baffle can be moved to one of five positions to match conditions using the convenient wing nuts.
    • When mulching grass, the operator should start with the baffle set in the highest position (greatest opening).
    • In drier conditions or when mulching leaves, the baffles can be moved down to reduce the amount of material that is discharged.

Note:The holes in the adjustable baffle are intended for leaf mulching. When mulching dry leaves, the holes will allow some air and leaf particles to escape, reducing blow-out in other areas of the mower. However, when mulching grass, these holes can be expected to plug.

  • Mow when the grass is dry.
  • Observe the 1/3 rule.
    • No more than 1/3 of the grass blade should be cut off at one time; this allows more efficient mulching and will promote the continued good health of the grass. If the desired cut height can't be achieved by cutting off 1/3, or there is clumping of the clippings, it may be required to cut higher. Wait a day then lower the mower and make a second pass.
  • Mow at proper intervals - approximately every 4 to 5 days.
  • Always mow with a sharp blade.


  • Remove Tricycler attachment and install the appropriate medium or high lift blade.


  • Deflector ramp and discharge cover must be removed.
  • Special mulching blade may be used if satisfactory results are achieved. If not, remove and replace with standard blade.

Compatibility information

The Tricycler mulching attachment is compatible with riding equipment having a seat safety switch (in good operating condition) to prevent an operator from adjusting the baffle while the mower is running.
Fits models:
  • GX70
  • GX75
  • GX85
  • RX63
  • RX73
  • RX75
  • SX75
  • SX85
  • SRX75
  • 108
  • 130
  • STX30


  • California use info:

    ⚠ Warning: Cancer and Reproductive Harm -

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Customer Reviews

Makes All the Difference in Quality of Cut
I recently replaced my high-lift 30-inch blade and worn bagging system with this mulching kit, and couldn't be more pleased. The mower now uses much less fuel (lower air resistance than the stock blade) and does an incredibly fine job in mulching and mowing. This is well worth the investment, and installation took no more than 15 minutes, with no holes to drill.
Did you find this helpful?  6 of 6 Found Helpful
Reviewed by:  from York, PA. on 10/2/2014
Tri-cycler Mulching Kit - BM17920
When buying new parts for an old and well used machine rarely does everything fit without some serious "convincing." This kit is standard John Deere quality, fit perfectly and works as advertised. The part was ordered and arrived in a very timely manner. I will definitely do business with the GreeenPartStore. Thank you.
Did you find this helpful?  4 of 4 Found Helpful
Reviewed by:  from New Bern, NC. on 3/17/2014
30-inch Tri-Cycler Mulching Kit - BM17920
Great mulching kit. Fairly simple to install, even without removing the deck (elevate the front of the mower to get enough clearance for the drill). Very substantial metal kit, not the lightweight plastic found on others. Took care of lots of leaves this fall very easily. It sure beats raking!
Did you find this helpful?  4 of 5 Found Helpful
Reviewed by:  from Rochester, NY. on 11/28/2011
Great Addition
I finally got this installed and couldn't be more pleased. It is quieter and does a fabulous job of mulching. A little bit of a challenge to drill through the deck as it is hard steel. Other than that a very simple, easy installation.
Did you find this helpful?  2 of 2 Found Helpful
Reviewed by: (Verified Buyer)  from Littleton CO. on 11/22/2017
Contract Administrator
Very happy with the Mulching kit. I won't be bagging till fall! Exactly as advertised. Thanks!
Did you find this helpful?  2 of 2 Found Helpful
Reviewed by:  from Bay City, MI. on 7/2/2012
Great mulching kit! Does everything as promised. Very easy installation if you have some mechanical skills. I'm 100% satisfied with this product and company!
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from Atlanta, GA. on 8/22/2016
Best Upgrade Ever.
Best mulching system I have seen. Easy to install. Made a 20yr JD come alive again.
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from North Charleston, SC. on 10/17/2012
Tri-Cycler Mulching Kit
Works as advertised. Much less expensive than buying similar parts at the John Deere store.
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from Enumclaw, Wa.. on 5/9/2012
Mulch kit
Easy to install. Very efficient. Lawn looks great. Lots of trees, lots of leaves, hate raking. My wife really loves this also, she hates raking also. Wish we discovered this method sooner.
Did you find this helpful? 
Reviewed by:  from Silver Lake. on 10/30/2020
I recieved my mulch kit and had it installed the same day. The quality of the material is great, really sturdy. Everything lined up on my mower perfectly. Ive mulched leaves twice so far, both times i my yard was left looking like a leaf never even fell on it. Great product !! Highly recommend.
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Reviewed by:  from Connersville. on 10/18/2020
Fit perfectly, bolted right up and works as expected.
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Reviewed by:  from Tulsa. on 6/12/2018
The product installed easily with no problems. The only fault that I had found was the wing nuts are made from inferior die-cast metal and breaks. Other than that, I am pleased with the way it cuts the lawn. I recommend this to anyone that does not want to bag their grass.
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Reviewed by:  from Newark, DE. on 5/18/2015

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