Bushwhacker ST180 15' cut, smooth top deck, deck rings, cv driveline, chain guards Gearboxes – 540 RPM or 1,000 RPM Three spindle gearboxes, 250 HP, base mounted, 1:1.6 ratio. One divider box, 275 HP, base mounted. All gearboxes have malleable housings, forged alloy steel, carbonized and hardened gears and shafts, tapered and ball bearings. 20 splined 1 3/4” input shaft, 2 3/8” output shaft on spindle boxes. Drive Shafts – Shielded PTOs made from finest quality propeller shaft materials and needle bearing universal joints. Category 5 80-degree constant velocity main drive shaft, Category 4 intermediate and wing drive shafts. Slip Clutch – Three heavy-duty clutches with spring type adjustment and two friction discs. Blades – 1/2” by 4” material, alloy spring steel, airlift design. Free swinging when encountering tructions. 8” overlap for better cutting. Blade tip speed: 16,768 FPM. Wheels – Six solid rubber tires standard. Independent shock absorbing system for all wheel axles. Cutting height adjustable from 2” to 15”. Optional: aircraft tires or implement tires.