Dynamax Grand Sport RVs For Sale

Dynamax Grand Sport Super C diesel motorhomes for sale at Motor Home Specialist, the #1 Volume Selling Motor Home Dealer in the World and the #1 Dynamax RV dealer in the country.

The Grand Sport is the most powerful motorhome in Dynamax's Super C lineup, built on the Freightliner® Cascadia 126 tandem twin-screw chassis with the Detroit® DD16 15.6L diesel rated at 600 horsepower and 1,850 lb-ft of torque. It targets buyers at the very top of the Super C market: stacker trailer haulers, race team owners, full-time RV owners with multiple tow vehicles, and shoppers cross-shopping the Grand Sport against high-end Class A diesel pushers and other heavy-duty Super C motorcoaches. With a 30,000-pound towing capacity (or 40,000 pounds with the pintle hitch), an 80,000-pound GCWR, three rooftop air conditioners, three lithium house batteries with 800 watts of solar, and an Oasis hydronic heat system, the Grand Sport sits in a different class than entry-level and mid-range Super C platforms.

The Grand Sport is built on the Freightliner Cascadia 126 chassis with a tandem twin-screw rear axle configuration, a 58,000-pound GVWR, and an 80,000-pound GCWR. Power comes from the Detroit DD16 15.6L diesel rated at 600 horsepower and 1,850 lb-ft of torque, paired with the DT-12 Efficient 12-speed automatic transmission, a 3.08 rear axle ratio, the C-Brake by Jacobs (with high/low settings), and a 300-amp brushless alternator. A 120-gallon fuel tank handles range, and the rear axle includes a locking differential. The hitch package includes a 32,000-pound ball or 40,000-pound pintle rating with a 6,000-pound tongue rating. Glad Hands air brake connection and controller adds tow vehicle air brake compatibility. Air brakes with 4-wheel ABS and automatic slack adjusters, 40,000-pound rear air suspension with automatic deflation, and a brake line air dryer with heater handle stopping and ride. Driver-assist tech includes the Detroit Safety Assurance Package (Active Brake Assist, adaptive cruise control, lane departure warning, the Detroit Connect Safety Event Viewer), a Bird's Eye View 360-degree camera system, the Bendix SmarTire banded tire pressure monitoring system, the 10-inch touchscreen dash infotainment with wired and wireless Apple CarPlay® and Android Auto™, leatherette air-ride driver and passenger seats with swivel bases, a leather-wrapped Smart Steering Wheel, an adjustable steering column, dual bright remote heated mirrors, an air horn, and 3-point seatbelts.

The body uses 2-inch aluminum-framed laminated sidewalls with high-density block foam insulation, Azdel composite exterior fiberglass with no exterior wood, a steel basement structure, vacuum-bonded aluminum roof trusses with high-density block foam insulation, and a one-piece molded fiberglass roof cap. A quiet integrated air conditioner intake/ducting roof system includes channeled rooftop drains. Outside features include custom full-body paint with scheme-matching cab door jambs and slideout sides, a premium cut-and-buffed finish, front-end Diamond Shield paint protection, dual roof-mounted integrated armless patio awnings with LED lighting and wind sensors, aluminum-wrapped slideout toppers, an LED patio light, a 30-inch entry door with rotary latch and dark-tinted frameless window, a keyless entry touch pad, the One Key locking system for exterior storage doors and entry door, remote-locking exterior storage and entry doors, a lighted acrylic entry grab handle, power entry steps, front and rear LED clearance and marker lighting, side docking lights, and the rear DYNAMAX rock guard. The exterior wall-mounted entertainment center pairs a 40-inch LED Smart TV with an integrated JBL soundbar on a swivel mount. Dual-pane dark-tinted frameless square windows include built-in night shades and screens, with a bonded front cap window and power shade. Steel storage compartments include LED lighting and side-hinged locking aluminum doors with chrome handles. Automatic 4-point hydraulic leveling jacks are standard.

The cab-over bunk is sized for adult sleeping with a 51-inch-wide mattress whose length tapers from 80 inches at the rear to 66 inches at the front, with a privacy partition.

Climate control runs three ducted low-profile 15,000 BTU rooftop air conditioners with heat pumps, the Oasis hydronic diesel heat system with continuous hot water, and Oasis-heated holding tanks and utility compartment. Power management includes a 10 kW Onan® diesel generator with auto transfer switch (mounted on isolator pads), an automatic generator start, three low-temp lithium house batteries (486 amp-hours total), four 200-watt glass solar panels (800 watts total) with MPPT controllers, a 2,800-watt hybrid pure sine wave inverter/charger, 50-amp service with a 34-foot power cord reel, an Energy Management System, the PrecisionPlex Multiplex command system with touchscreen and Bluetooth mobile app, a Thetford® Sani-Con® Turbo macerator system, a 4-way water management valve in the sewer bay, a black tank flush, the Pressure Sense tank monitoring system, an upgraded 12V on-demand water pump rated at 4 gallons per minute, a power water hose reel in the service bay, an exterior shower, a central vacuum system, a water filtration system, and standard Starlink satellite internet.

The interior runs heated porcelain tile flooring throughout, deluxe vinyl with pad in select living area slide rooms, a soft-touch padded vinyl ceiling, a powered flush-floor stepwell cover, a lighted porcelain tile entry surround with fitted carpet mats, dimmable LED recessed ceiling lights, soft-touch sprung residential-style dinette seats with lift-up storage, a home theater lounge with USB ports, a love seat, hardwood Shaker-style cabinetry and passage doors, full-extension soft-closing drawer guides with dovetail joints, hidden hinges, a 50-inch LED Smart TV in the living area, and a Sonos Ultra Arc soundbar with subwoofer.

The galley pairs solid-surface countertops with accent lighting and a tile backsplash, a stainless steel sink with solid-surface covers (and a dedicated storage compartment for the covers), a residential faucet with pull-out sprayer, a power kitchen countertop extension, a pantry, overhead cabinet accent lighting, under-cabinet lighting, and a MaxxAir® power vent with built-in rain cover. Cooking appliances include an induction range, a convection microwave with air fryer functionality, and a dishwasher. Refrigeration runs a 22-cubic-foot residential refrigerator with ice maker.

The master bedroom has a 70-by-80-inch king bed, a deluxe padded headboard, a designer bedding package, a 43-inch LED Smart TV, a fireplace, nightstands with solid-surface countertops, a digital safe in the wardrobe, LED reading lights, and USB charging ports. The 45CB includes a mid bath and a rear bath, both with a porcelain electronic-flush macerator toilet. Bathroom amenities include a 38-by-40-inch solid-surface shower with a teak fold-down seat, a glass door, shower skylight, deluxe multi-shower head system, the Aqua View® SHOWERMI$ER™ water-saving valve, solid-surface countertops with tile backsplashes, under-mount sinks with residential faucets, back-lit vanity mirrors, and a MaxxAir power vent with built-in rain cover.

At MHSRV, the Grand Sport is offered in a single floor plan: the 45CB. The 45CB is the dual-bath layout (mid and rear) with the heated porcelain tile floor, the home theater lounge, the love seat, the dishwasher-equipped galley, and the bedroom fireplace. Optional equipment is a stackable washer/dryer.

For shoppers cross-shopping the Grand Sport against other heavy-duty Super C motorcoaches and luxury Class A diesel pushers, browse the full Dynamax RV lineup at MHSRV to compare floor plans, pricing, and features across the brand.

Manufacturer options, features, colors, etc. can all change without notice and MHSRV assumes no responsibility for the changes or possible errors in information provided by the manufacturer. All weights and measurements are approximate and not guaranteed to be 100% accurate. For the latest information be sure to check with your salesperson and/or the coach manufacturer and verify before purchase.