The 2025 Grand Design Momentum G-Class 21G is a compact toy hauler designed for RVers who want maneuverability, comfort, and versatility without stepping into a massive unit. With its lightweight towing profile and efficient use of space, the 21G is perfect for riders, weekenders, and couples who love exploring Wyoming’s mountains, trails, and campgrounds. Grand Design engineered this model to be easy to tow while still offering a surprisingly spacious living area, functional kitchen, and comfortable sleeping arrangements.
Inside, you’ll find two sofas that double as seating and convertible sleeping options, a well-designed kitchen with a three-burner cooktop and mid-size refrigerator, and modern entertainment features like surround sound and Bluetooth capability. The stylish interior and smart layout make this model feel larger than it looks, offering plenty of room to relax after a long day outdoors.
The 21G is also built for flexibility, with solar prep, a tankless water heater, and prewiring for A/C and cable, giving you multiple ways to customize your setup. The rear garage is ideal for hauling motorcycles, dirt bikes, kayaks, and gear, making this Momentum perfect for adventure-driven RVers who need a small but capable toy hauler.
As Wyoming’s #1 Grand Design Dealer, Sonny’s RVs is proud to offer the full lineup of Momentum toy haulers, including the compact, popular, and rider-friendly 21G. Our family-owned dealership provides trusted support, transparent pricing, and extensive Grand Design product knowledge to ensure every customer finds the perfect fit. Whether you're a weekend explorer or upgrading your current toy hauler, our team is here to guide you every step of the way.
We make RV ownership simple with competitive financing options tailored to your needs. If you're upgrading, we also accept trade-ins on fifth wheels, toy haulers, travel trailers, and more helping you save on your new Grand Design Momentum.
Trade-In your RV at Sonnys RVs
Visit Sonny’s RVs in Casper, Wyoming to tour the 2025 Grand Design Momentum G-Class 21G and explore why Grand Design continues to be one of America’s most trusted RV manufacturers. Your next adventure starts here with Sonny’s RVs — Wyoming’s #1 Grand Design Dealer.
Information and features are based on manufacturer data and may vary from the actual unit. Sonny’s RVs is not responsible for errors or omissions. Prices and availability may change without notice. Buyers must verify all details, features, and conditions with a Sonny’s RVs sales representative before purchase.
| Stock # | N25-8914 |
| Location | Sonnys RVS |
| Year | 2025 |
| Make | Grand Design |
| Model | Momentum G-Class |
| Trim | 21G |
| Condition | NEW |
| Status | In Stock |
The 2025 Grand Design Momentum G-Class 21G is a compact toy hauler designed for RVers who want maneuverability, comfort, and versatility without stepping into a massive unit. With its lightweight towing profile and efficient use of space, the 21G is perfect for riders, weekenders, and couples who love exploring Wyoming’s mountains, trails, and campgrounds. Grand Design engineered this model to be easy to tow while still offering a surprisingly spacious living area, functional kitchen, and comfortable sleeping arrangements.
Inside, you’ll find two sofas that double as seating and convertible sleeping options, a well-designed kitchen with a three-burner cooktop and mid-size refrigerator, and modern entertainment features like surround sound and Bluetooth capability. The stylish interior and smart layout make this model feel larger than it looks, offering plenty of room to relax after a long day outdoors.
The 21G is also built for flexibility, with solar prep, a tankless water heater, and prewiring for A/C and cable, giving you multiple ways to customize your setup. The rear garage is ideal for hauling motorcycles, dirt bikes, kayaks, and gear, making this Momentum perfect for adventure-driven RVers who need a small but capable toy hauler.
As Wyoming’s #1 Grand Design Dealer, Sonny’s RVs is proud to offer the full lineup of Momentum toy haulers, including the compact, popular, and rider-friendly 21G. Our family-owned dealership provides trusted support, transparent pricing, and extensive Grand Design product knowledge to ensure every customer finds the perfect fit. Whether you're a weekend explorer or upgrading your current toy hauler, our team is here to guide you every step of the way.
We make RV ownership simple with competitive financing options tailored to your needs. If you're upgrading, we also accept trade-ins on fifth wheels, toy haulers, travel trailers, and more helping you save on your new Grand Design Momentum.
Trade-In your RV at Sonnys RVs
Visit Sonny’s RVs in Casper, Wyoming to tour the 2025 Grand Design Momentum G-Class 21G and explore why Grand Design continues to be one of America’s most trusted RV manufacturers. Your next adventure starts here with Sonny’s RVs — Wyoming’s #1 Grand Design Dealer.
| General | |
|---|---|
| Class | Travel Trailer |
| Secondary Category | Toy Hauler |
| Other Specifications | |
|---|---|
| Wheels Composition | Aluminum |
| Number Of Axles | 2 |
| Front Brake Type | Not Applicable |
| Rear Brake Type | Electric Drum |
| Width (IN/MM) | 8.42 ft. (101 in.) |
| Length (FT/IN) | 26' 11" |
| Gross Weight Rating (LB/KG) | 11,000 lbs. LBS |
| Number Of Propane Tanks | 2 |
| Total Propane Tank Capacity (GAL/LBS) | 40 lbs. |
| Body Material | Fiberglass |
| Number Of Doors | 1 |
| Number Of Slideouts | 1 |
| Awning Length (FT/M) | 19 ft. (228 in.) |
| Power Retractable Awning | Yes |
| Kitchen Table Configuration | Pedestal Table |
| Kitchen Location | Center |
| Living Area Location | Center |
| Number Of Oven Burners | 3 |
| Overhead Fan | Yes |
| Layout | Oven / Stove |
| Refrigerator Power Mode | Electric / Propane |
| Number Of Sofas | 2 |
| Sofa Material | Vinyl |
| Reclining Sofa | No |
| Max Sleeping Count | 6 |
| Number Of Bunk Beds | 0 |
| Number Of Double Beds | 0 |
| Number Of Full Size Beds | 1 |
| Number Of Queen Size Beds | 1 |
| Number Of King Size Beds | 0 |
| Number Of Convertible Sofa Beds | 1 |
| Bunkhouse | No |
| Number Of Bathrooms | 1 |
| Bathroom Flooring Type | Vinyl |
| Bathroom Location | Center |
| Toilet Type | Plastic |
| Bathroom Sink | Center |
| Bathroom Medicine Cabinet | Center |
| Bathroom Mirror | Center |
| Bathroom Vent Fan System | Center |
| Battery Power Converter | Yes |
| Air Conditioning Prewiring | Yes |
| Cable Prewiring | Yes |
| Phone Prewiring | No |
| Heat Prewiring | Yes |
| TV Antenna Prewiring | Yes |
| Satellite Prewiring | Yes |
| Washer/Dryer Prewiring | No |
| Number Of Emergency Exits | 1 |
| Air Conditioning Type | Automatic |
| Heater Type | Automatic |
| Satellite | No |
| Number Of Radios | 1 |
| Surround Sound | Yes |
| Rear Video Backup Camera | Yes |
| Wallpaper | Yes |
| Interior Wood Finish | Yes |
| Basic Warranty (MO) | 12 |
| Structure Warranty (MO/MI) | 36 |
| Spec | 0 |
| Type | Toy Hauler |
| Solar Battery Charger | Yes |
| Water Heater Tank | Yes |
| Shower | Center |
| Toilet | Center |
| Heater | 30,000 BTUs |
| Air Conditioning | 15,000 BTUs |
| Speakers | Interior / Exterior |
| Height Closed (IN) | 12.33 ft. (148 in.) |
| Recliners/Rockers | 2 |
| Dry Weight (LBS) | 6400 LBS |
| Hot Deals |
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