TB120 TriAction® 21" Walk-Behind Push Mower

3-in-1 Capability: Side Discharge / Mulch / Rear Bag Lawn Mower


$229.99 IN-STOCK

Troy-Bilt's TB120 walk-behind mower's TriAction® cutting system features a rake bumper to lift grass upright, a specially designed blade for a finer mulch and a symmetrical deck for superior grass flow, eliminating clumping. The TB120 push mower is powered by an easy starting 159cc* Troy-Bilt OHV engine and equipped with 11" rear wheels for all terrain types, dual lever deck height adjustment and 3-in-1 discharge capability.


Signature Features

Additional Features

  • 21" steel mulching deck
  • 3-in-1 convertible - side discharge, mulch or rear bag
  • Standard 1.9-bushel grass catcher (included)
  • Dual-lever deck height adjustment
  • 3-position height adjust handle
  • 159cc* Troy-Bilt® 550ex OHV engine
  • 2-year limited warranty

*As rated by engine manufacturer


Troy-Bilt OHV
Starting System 
Recoil with Autochoke
20oz 10W30 (included)
Fuel Capacity 
21" TriAction cutting system
Discharge Type 
3-in-1 convertible - side discharge, mulch or rear bag
Grassbag Capacity 
1.9 bushel (included)
Drive System 
Speed Control 
Handle Style 
3-position height adjust
Deck Height Adjustment 
Dual-lever deck height adjustment
Cutting Height Range 
6 settings from 1.25" - 3.75"
7" front, 11" rear
Shipping Dimensions 
36.5"(L) x 24"(W) x 17.5"(H)
Shipping Weight 
2-year limited, SureStart

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† † The operator's manual posted is for general information and use. To ensure the download of the operator's manual specific to your unit, we require a model and serial number. Click here to enter that information.

† Models and pricing may vary by retailer. Please check with your retailer for specific availability and pricing.

† *as rated by engine manufacturer

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