2026 Exmark Radius S-Series Kawasaki FR691

With a compelling blend of speed, power, cut quality and value, the new Radius S-Series is the ideal zero-turn mower for home and acreage owners that demand advanced performance. Choose from 48-, 52- or 60-inch UltraCut Series 3 side-discharge cutting decks equipped with Exmark’s exclusive flow-control baffles for superior cut quality. The deluxe high-back seat features adjustable spring suspension, with molded flip-up armrests to deliver superior all-day comfort for operators of virtually any stature.







Radius S-Series models are designed for maximum durability with reduced maintenance needs. With just two annual grease points, low-maintenance HydroGear transmissions, reliable Kawasaki engines, and long-lasting components, the Radius S-Series is designed to run stronger and longer with less maintenance.

Features
Full-Suspension Operator Seat: The Radius S-Series upgrades to a deluxe full-suspension operator seat to minimize bumps and vibration that reach the operator. When combined with the large 23-inch drive tires, the Radius S-Series delivers a smoother ride for increased operator comfort and decreased fatigue.
UltraCut Series 3 Cutting Deck: Fabricated and fully welded of high-strength steel, the UltraCut Series 3 cutting deck features Exmark's exclusive Flow-Control baffles for Exmark Signature cut quality. Maintenance-free sealed bearing spindle assemblies and double-capture anti-scalp rollers offer increased durability with reduced maintenance requirements.
Integrated Hydro Pumps and Motors: Dual Hydro-Gear ZT-3100 hydro transmissions feature an integrated pump and motor design for maximum efficiency, long-term reliability and ground speeds of up to 9 mph.
High-Strength 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.
Easy Serviceability: With a floor pan and belt shields that remove easily, without tools, and an integrated jack receiver at the front of the frame, Radius models offer unparalleled maintenance access to the top and bottom of the cutting deck.
Upgraded Commercial Warranty: Radius S-Series models are covered by an extended 4-year/500-hour commercial warranty.
Equipment
UPC: 193308242460
Width / Cutting Deck: 52"
Drive: Hydro-Drive
Starter: Electric
Steering Control: Hydraulically dampened twin levers adjustable both fore and aft. Also has 2-position height adjustment.
Caster Forks: .375" thick caster yoke arms.
Front Caster Tires: 13 x 6.5-5 smooth-tread, pneumatic.
Drive Tires: 23 x 9.5-12 K3012
Safety Package: Operator Presence Controls (OPC) and drive system interlock.
Parking Brake: Automatic-actuated pawl brake.
Tractor Frame: Unibody, welded, heavy-duty 1.5" x 3" tubular steel.
Blade Spindles: No maintenance, sealed and non-greasable spindles; 7.75"-diameter cutter housing with 25mm (.98") diameter spindle shaft.
Cup Holder: Yes
Electrical: 12 volt battery with 15-amp alternator
Standard Features: Hour meter, cup holder, hitch, suspension seat
Seat: Deluxe, two-tone, bolstered suspension seat with flip up armrests and 3" travel
Optional Features: Hour meter, suspension seat and armrests
Power Components
Transmission Brand: Hydro-Gear
Engine Brand: Kawasaki
Transmission Speeds: Infinitely Variable
Engine Model: FR691
Engine Displacement: 691 cc
Engine Series: V-Twin
Fuel System: Carbureted
Speed: Infinitely variable speed selection from 0–9.0 mph forward, 0–4.5 mph reverse
Transmission: Hydros