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Radius vs ISX 800

Radius vs ISX 800 compared side by side: specs, ratings, price and owner feedback from our independent reviews.

Radius vs ISX 800
Exmark Radius Ferris ISX 800
Our rating 3.8 4.2
Performance 4.0 4.5
Build quality 4.0 4.5
Reliability 4.0 4.0
Value for money 3.5 3.0
Comfort & ergonomics 3.5 4.5
Features 3.5 4.5
Price $6,699 $11,769
Specifications
Power type Gasoline Gasoline
Engine Kawasaki FR691V 23 hp (S-Series 48 and 52-in.); Kawasaki FR730V 24 hp (S-Series 60-in.); E and X not clearly stated Briggs and Stratton CXi 27 hp (incl. EFI-ETC OilXtend version); Kawasaki FT730V 24 hp; Kawasaki FT730V EFI 26 hp, gross, per Ferris
Displacement — 810 cc (Briggs); 726 cc (Kawasaki)
Fuel type Gasoline Gasoline
Transmission HydroGear ZT-3100 (S-Series) Dual Hydro-Gear ZT-3400 transaxles with 7-in. cooling fans
Drive Zero-turn, dual-lever steering Zero-turn, rear-wheel drive, lever steering
Deck size 48, 52 and 60 in. (S-Series); 48, 54 and 60 in. (E-Series) 52 or 60 in.
Deck construction UltraCut Series 3, 10-gauge top and 7-gauge skirts (S-Series); Series 2+ fabricated welded (E-Series) 10-gauge fabricated steel
Cutting height — 1.5 to 5 in.
Discharge Side discharge —
Top speed Up to 8 mph (E-Series); up to 9 mph (S-Series) 0 to 10 mph forward, 0 to 5 mph reverse
Front tires — 13x6.5-6
Rear tires 23-in. drive tires (S-Series) 23x10.5-12
Weight — 1,206 lb (52-in.); 1,268 lb (60-in.), dry
Fuel capacity 7 US gal 6 US gal
Model numbers RZS730GKA603A3 (S 60), RZE708GEM48C00 (E 48) 5902154, 5902155 (52-in.); 5902075, 5902073, 5902074, 5902172 (60-in.)
Cash prices E $6,699, S $7,199, X $9,999 —
Blade tip speed About 18,500 ft/min —
Dimensions (60-in.) 72.3 in. W x 80.5 in. L x 69.7 in. H —
Suspension — ForeFront Suspension System, 10-year warranty
Spindles — Aluminum, greasable
Overall length — 81 in.
Verdict The Radius gives you a thick-skirted deck, 8 to 9 mph and a 7-gallon tank for much less than a Lazer Z. Pages disagree on a few details, so check…
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The ISX 800 pairs a 10-gauge deck and large 23-inch drive tires with real suspension and a wide choice of engines. It is priced well above the other Ferris models…
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