2021 GRAND DESIGN 397TH-R

2021 GRAND DESIGN 397TH-R Features;

Powerful off-grid solar and inverter setup! Power everything without the need for being plugged in!

If you're looking for a high-end toy hauler with residential comfort and massive garage space, this 2021 Grand Design Momentum 397TH-R delivers. Built for serious adventure and extended trips, this triple-axle fifth wheel combines luxury living with a dedicated garage for your motorcycles, ATVs, or side-by-side.

This is one of Grand Design’s most popular Momentum toy hauler floorplans, featuring two full bathrooms, a separate garage, and premium residential features throughout.

Key Specs

Length: 43 ft 1 in

GVWR: 21,000 lbs

Slides: 3 slide-outs

Garage: 12 ft 6 in separate toy hauler garage

Fuel Station: 60 gallon capacity

Fresh Water: 155 gallons

Grey Water: 104 gallons

Black Water: 104 gallons

Triple Axle (3 × 7,000 lb axles)

50 Amp Service

Interior Living & Kitchen

The Momentum series is known for its luxury residential feel, making it perfect for long trips or full-time RV living.

Features include:

Large living area with theater seating

Electric fireplace and entertainment center

49" LED TV in living room

Residential stainless refrigerator

Kitchen island with bar seating

Microwave, oven, and multi-burner cooktop

Solid surface countertops

Tons of cabinet and pantry storage

Sleeping & Bathrooms

This floorplan offers comfortable sleeping for family or guests.

Front master bedroom with queen bed

Large walk-in closet

Full front bathroom

Second full bathroom in the garage

Garage area with power Happi-Jac bed and convertible seating

Loft sleeping space above the garage

Toy Hauler Garage

Perfect for hauling toys while still having a comfortable living space.

12'6" dedicated garage

Heavy-duty rear ramp door

Fuel station for the toys

Rear patio / party deck setup

Tie-downs for secure transport

Separate entry door to the garage area

Exterior & Convenience Features

Three power awnings with LED lighting

Outdoor entertainment area with TV

Hydraulic leveling system

Outside speakers

Heated and enclosed underbelly for extended-season camping

Large pass-through storage

Triple A/C capability and powerful furnace for climate control