2026 Exmark Radius X-Series RDX691GKA524A3

Information

2026 Exmark Radius X-Series RDX691GKA524A3

Discover the Exmark Radius X-Series Mower

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

Choose from 52- or 60-inch UltraCut Series 4 side-discharge cutting decks and premium Kawasaki commercial engines. Integrated high-capacity HydroGear transmissions work with aggressive 24-inch Kenda drive tires to deliver unmatched traction and control, with ground speeds of up to 10 mph. Large semi-pneumatic caster tires, upgraded 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 delivers enhanced operator comfort that’s ideal for long work days.

Looking for more power, larger cutting decks and cutting-edge innovation and productivity? Check out our premier Lazer Z family of commercial zero-turn mowers. (RD models coming in 2026.)

Features may include:

UltraCut Series 4 Cutting Deck

Fabricated and fully welded of high-strength steel, the UltraCut Series 4 cutting deck features Exmark’s exclusive Flow-Control baffles for Exmark Signature cut quality. Maintenance-free sealed bearing spindle assemblies and upgraded double-capture anti-scalp rollers offer increased durability with reduced maintenance requirements.

Kawasaki Commercial Engines

Radius X-Series takes commercial power and performance to the next level with premium Kawasaki V-twin engines.

High-Back Suspension Seat

Radius X-Series features a deluxe high-back operator seat with three inches of adjustable suspension, plus an EVC stretch foam base and iso mounts at the seat base for superior all-day mowing comfort.

Heavy-Duty Fabricated Steel Frame

Fabricated and fully welded of high-strength rectangular steel tubing, the Radius frame places the heaviest components –– engine, transmission and fuel tank –– low and centralized in the frame. This lowers the machine’s center of gravity for increased traction and stability. New steel engine guards increase engine protection at the sides and rear of the machine, while also being easily removable for service access.

Upgraded Caster Assemblies

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

  • Rudyard, Michigan
  • 2026
  • Exmark
  • Radius X-Series RDX691GKA524A3
  • Model: FX691V | Series: V-Twin | Spec: FX691V_S25
  • 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
  • 64.3"
  • 69.7" | Cutting: 1.5" to 5.0" in 0.25" increments.

Specifications

  • 2026
  • Exmark
  • Radius X-Series
  • RDX691GKA524A3
  • Zero-Turn Mower
  • Model: FX691V | Series: V-Twin | Spec: FX691V_S25
  • Kawasaki
  • Electric
  • 726 cc
  • 25.5 hp
  • 3,800 rpm
  • Cyclonic Air Cleaner
  • Carbureted | Fuel Indicator: Translucent Visual
  • Gas Carbureted
  • Engagement: MagStop electromagnetic 125-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.
  • Caster: 13 x 6.5-6, smooth tread, pneumatic. Caged Roller Bearings (126-3289)
  • 23 x 9.5-12 Super Turf TL
  • 12-volt battery with 15-amp alternator.
  • Forward: 9.0 mph | Reverse: 0–5.0 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.
  • 64.3"
  • Deck: 52"
  • 80.3" | Blades: 3 Blades at 18.00"
  • 69.7" | 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: 923 lbs.
  • Engine hour meter, cup holder, tow hitch and jack receiver | UPC: 193308243849 | Blade Spindles: No maintenance, sealed and non-greasable spindles; 7.30"-diameter cutter housing contains 17mm (.67") diameter spindle shaft and hex blade drive.
  • 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 3. 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.