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Toro Groundsmaster® 3500-D Sidewinder Ride-on Mower

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The Groundsmaster® 3500-D is a revolutionary triplex rotary mower designed for superior performance mowing. The free-floating Contour™ Plus cutting decks feature a rear roller, front caster wheels, anti-scalp cup and multi-directional pivot points to bring you the industry’s best ground-following rotary deck, allowing mowing of undulating terrain without scalping. The powerful Kubota®, 35 hp (26.1 kw) engine and exclusive Series/Parallel traction drive system, gets the mowing job done quickly.

The Groundsmaster 3500-D Sidewinder is also commonly known as: GM 3500, GM 3500D, GM3500, GM3500D, GM 3500 D, Groundsmaster, Grounds Master 3500 D, Toro Groundsmaster, GM Sidewinder


There’s a new standard for cutting quality from a rotary mower. The Toro® Groundsmaster® 3500-D offers the precision trimming performance you’d expect from a reel mower in a versatile rotary. With the exclusive Sidewinder® cutting system and appealing striping effect – it’s the perfect trim mower for sports fields, golf courses and other specialty grounds applications.

  • Engine: Kubota® 35 hp
  • Fuel Capacity: 11 gallons (41.6 L)
  • Ground Speed: Forward 0-6 mph (10 km/h)
  • Steering Controls: Hydraulic power steering
  • Weight: Approx. 2,200 lbs. (1,000 kg)
  • Warranty: 2 year limited warranty

Product Video

Product Features


The Groundsmaster® Contour Series mowers provide the productivity you need, no matter the size. Mow up to 10.6 acres (4.3 hectares) per hour to get the job done fast.

Lighter Weight Design

Optimized design and use of lightweight materials means less weight and turf compaction without sacrificing performance and functionality.

Easy Service

Quick and easy access to all major service areas.

Scalp-Free Mowing

The ground-following design of each Contour™ Plus free-floating deck permits mowing the most challenging berms without scalping. Two front rollers and a rear roller allow the deck to smoothly pass over turf.

Sidewinder® Cutting Unit System

Sidewinder cutting units shift left and right a total of 24 inches (61 cm). This allows the tire tracks to be shifted within the mowing path to reduce wear on the turf.

Time Saving

Unlike any other mower on the market, the Groundsmaster® 3500-D allows you to be more productive. The 68" (173 cm) width-of-cut allows you to mow generous swaths, yet its compact size and the Sidewinder® system also allow you to make tight maneuvers in trim areas. Locations normally requiring two different machines can be handled by one.

Operator Comfort

Deluxe seat adjusts to let you customize your work environment and reduce fatigue. Plenty of space at the operators station paired with easy-to-read controls increases comfort. Plus the steering wheel tilts for steering preference.

Brochures, Parts & Manuals

View and download documentation for this item.

  • 2023-24 Toro Performance Parts Quick Reference Guide (Full Brochure)

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  • Blades Reference Chart – Toro Groundsmaster®

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Why choose Toro? 100 Years of Excellence

With roots dating back to 1914, The Toro Company was built on a tradition of quality and caring relationships. Today, the company is a leading worldwide provider of innovative solutions for the outdoor environment including turf and landscape maintenance, snow and ice management, underground utility construction, rental and specialty construction, and irrigation and outdoor lighting solutions. Through a strong network of professional distributors, dealers, rental stores and retailers in more than 125 countries, we proudly offer a wide range of products across a family of global brands to help golf courses, professional contractors, underground construction professionals, groundskeepers, agricultural growers, rental companies, government and educational institutions, and homeowners – in addition to many leading sports venues and historic sites around the world.

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