TB320 TriAction® 21" Rear Wheel Self-Propelled Walk-Behind Mower

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


$329.99 IN-STOCK

Troy-Bilt's TB320 walk-behind mower features a rear wheel, self-propelled drive system, a dependable 190cc* Briggs & Stratton® engine and the TriAction® cutting system.  The 6-position single-lever deck height adjustment makes setting your cutting height quick and convenient while the 3-in-1 capability of this walk-behind mower allows you to choose between side discharging, mulching and rear bagging.

Signature Features

Additional Features

  • Briggs & Stratton Starting promise - starts in 2 pulls or they'll fix it for free
  • SelectSpeed variable transmission allows you to easily select and set your perfect speed
  • Rear wheel self-propelled drive for the ultimate traction in any mowing condition
  • 21" heavy duty steel mulching deck
  • 3-in-1 convertible: side discharge, mulch or rear bag
  • Single lever deck height adjustment easily adjusts the cutting height for a healthy lawn
  • Standard 2.3-bushel grass catcher
  • 2-year limited warranty

*As rated by engine manufacturer


Starting System 
Recoil w/ReadyStart
Drive System 
Rear wheel self-propelled
Speed Control 
SelectSpeed 4-speed variable
21" TriAction cutting system w/integrated premium deck wash
18oz SAE30 (included)
Discharge Type 
3-in-1 convertible: side discharge / mulch / rear bag
Fuel Capacity 
Grassbag Capacity 
1.9 bushel (included)
Deck Height Adjustment 
Single lever height adjuster 1 1/2" - 4"
Handle Style 
Ergonomic with comfort grip
2-year limited
Briggs & Stratton 725ex Series
Cutting Height Range 
6 settings from 1.75" - 3.75"
8" front, 8" rear
Shipping Dimensions 
36.7"(L) x 24"(W) x 17.75"(H)
Shipping Weight 

Find parts for this model

This Kit includes TB320 TriAction 21" Rear Wheel with Cover Bundle

$351.98 $349.99

This Kit includes TB320 TriAction Rear Wheel with Floor Mat

$354.98 $349.99


This Kit includes TB320 TriAction Rear Wheel with set of Extreme Blades

$348.68 $339.99

This Kit includes TB320 TriAction with Extreme Blades and Blade Removal Tool

$357.67 $344.99

This Kit includes TB320 TriAction Rear Wheel with Cover and Floor Mat Bundle

Financing Offers

The TB320 XP 21" Rear Wheel Drive Self-Propelled Mower qualifies for financing! Call 800-828-5500 for financing details and to apply. Click here for details


† † 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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