Model 240 is 42 inches long and 23.5 inches wide with a wheel base of 29 inches and a turning radius of 37 inches. Model 240 is 46 inches long and 23.5 inches wide with a wheel base of 33 inches and a turning radius of 41 inches. CONTROLS: Universal one-hand control tiller. A foot pedal to control starting, stopping, and speed is also available. REAR-WHEEL DRIVE: Removable, sealed rear-wheel drive transaxle. SEAT: Deluxe padded folding swivel seat and an adjustable height seat post. The seat height adjusts to 20, 20.75, or 21.5 inches. A high back seat with lumbar support and an adjustable headrest and a 20-inch extra-wide seat are also available. An optional 5-inch electric seat lift is also offered. CUSHION: An optional Bye-Bye Decubiti natural rubber air cushion is available with or without a fleece cover. UPHOLSTERY: Gray vinyl. A removable, machine-washable velour seat cover is also available. ARMRESTS: Padded flip-up armrests are standard. The extra-wide seat includes lift-up armrests. BRAKES: Regenerative, dynamic braking system to stop movement when lever is released and an automatic parking brake with manual release. WHEELS: Three 9-inch wheels with maintenance-free, flat-free foam-filled tires.