Radius vs ISX 800
Radius vs ISX 800 compared side by side: specs, ratings, price and owner feedback from our independent reviews.
| Radius | 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… Read the full review |
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… Read the full review |


