2025 Exmark Radius X-Series RZX921GKA604A3

Information

2025 Exmark Radius X-Series RZX921GKA604A3

Product Overview

If you’re looking for the power and productivity of a premium commercial mower on a budget, you’re looking for a Radius X-Series. It combines features proven on our premier machines with the unbeatable value and efficiency you’ve come to expect from the Radius.

Choose from 52- or 60-inch UltraCut Series 4 cutting decks, both with powerful Kawasaki commercial engines –– a FX801 on the 52-inch, and a FX921 on the 60-inch. The integrated Hydro-Gear transmissions work with aggressive 24-inch Kenda drive tires to provide unmatched traction and control, with forward speeds of up to 10 mph. Large semi-pneumatic caster tires, cast steel caster forks, and tapered caster pivot bearings provide years of maintenance-free performance. And with an adjustable full-suspension operator seat and isolated floor pan, the Radius X-Series provides added comfort.

Looking for more power, larger cutting decks and cutting-edge productivity and efficiency? With cutting decks of up to 144-inches wide, our Lazer Z line is as good as it gets.

Features may include:

UltraCut Deck Technology
  • Exmark’s exclusive UltraCut decks are featured on Radius models. Every UltraCut cutting deck features Exmark’s exclusive maintenance-free, sealed-bearing spindle assemblies for increased durability and reduced downtime, combined with zero maintenance.
Heavy Duty Fabricated Frame
  • With a fully welded frame built from 2x3-inch frame tubes, the Radius design places major components including the engine, hydro drive system and fuel tank lower in the frame. The lower center of gravity and better mass centralization results in increased traction and stability, with improved handling.
Full-Suspension Operator Seat
  • Radius S- and X-Series models feature an adjustable full-suspension operator seat, with three inches of suspension and an EVC stretch foam base for superior all day mowing comfort.
New Side Pods
  • The new side pod design places the most important controls right at the operator’s fingertips, for easy operation with a minimum of necessary movement.
Upgraded Casters
  • Radius X-Series models feature upgraded caster assemblies featuring maintenance-free tapered caster pivot bearings, with cast steel caster forks and large, semi-pneumatic caster tires.

Photos

Highlights

  • Greencastle, Indiana
  • 2025
  • Exmark
  • Radius X-Series RZX921GKA604A3
  • Model: FX921V | Series: V-Twin | Spec: FX921V_S04-R
  • Hydrostatic | Brand: Hydro-Gear | Dual Hydro Gear ZT3400, hydrostatic transmission with charge pumps, relief valves and independent, replaceable filters. | Speeds: Infinitely Variable
  • Gas Carbureted
  • Available
  • 72.3"
  • 70" | Cutting: 1.5" to 5.0" in 0.25" increments.

Specifications

  • 2025
  • Exmark
  • Radius X-Series
  • RZX921GKA604A3
  • Zero-Turn Mower
  • Model: FX921V | Series: V-Twin | Spec: FX921V_S04-R
  • Kawasaki
  • Electric
  • 999 cc
  • 31 hp
  • 3,820 rpm
  • Heavy-duty canister air filtration system
  • Carbureted | Fuel Indicator: Translucent Visual
  • Gas Carbureted
  • Engagement: MagStop electromagnetic 225-ft-lb clutch
  • Hydro-Drive | Drive Wheel Release: Allows unit movement without engine running.
  • Control: Hydraulically dampened twin levers adjustable both fore and aft. Also has 2-position height adjustment.
  • Hydrostatic | Brand: Hydro-Gear | Dual Hydro Gear ZT3400, hydrostatic transmission with charge pumps, relief valves and independent, replaceable filters. | Speeds: Infinitely Variable
  • Lever-actuated pawl brake.
  • 13 x 6.5-6, smooth tread, pneumatic. Sealed Taper Roller Bearings
  • 24 x 12-12 K3012
  • 12V battery with 15 amp. alternator.
  • Forward: 10.0 mph | Reverse: 0–6.0 mph
  • Blade: Approximately 18,500 fpm.
  • 10-gauge high strength alloy top that is formed and continuously seam welded, with 7-gauge side skirt.
  • Operator Presence Controls (OPC) and drive system interlock, with safety interlock system indicators.
  • Casters Forks: .375" thick caster yoke arms.
  • 72.3"
  • Deck: 60"
  • 80.5" | 3 Blades at 20.50" Length
  • 70" | Cutting: 1.5" to 5.0" in 0.25" increments.
  • Blade Cutter Housing: 7.75" | Blade Shaft: 98"
  • 7-gallon single fuel tank with single fill location.
  • Curb: 1006 lbs.
  • UPC: 193308225210
  • Deluxe suspension (adjustable spring suspension) seat with high back, molded foam flip-up armrests, and integral safety switch
  • Caster Forks: Cast steel caster fork | Style: Floating Deck | Style Description: Full-floating UltraCut Series 4. Side discharge standard, with molded discharge chute and option to bag or mulch. | Tractor Frame: Unibody, welded, heavy-duty 2" X 3" rectangular tubular steel.