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Used 2021 GRAND DESIGN MOMENTUM 399TH
North Canton, Ohio
MSRP$74,999 USD $64,997
View Floor Plan
Condition: Used
Exterior Length: 43 ft
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 20,000 lb
Number of Axles: Tri
Description: USED 2021 GRAND DESIGN MOMENTUM 399TH – 367503
Grand Design Momentum toy hauler 399TH highlights:
Dual Entry
Full and Half Bath
Exterior...
Updated: Saturday, September 26, 2026 03:30 AM
Seller: General RV Center - Canton
Condition: Used
Exterior Length: 43 ft 1 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 20,000 lb
Number of Axles: Tri
Description: Used 2021 Grand Design Momentum 399TH
Details: Grand Design Momentum toy hauler 399TH highlights: Dual Entry Full and Half Bath Exterior LED TV ...
Updated: Tuesday, October 20, 2026 03:13 AM
Seller: Willies RV
Condition: Used
Exterior Length: 43 ft 1 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 20,000 lb
Number of Axles: Tri
Description: Used 2020 Grand Design Momentum 399TH
Details: Grand Design Momentum toy hauler 399TH highlights: Dual Entry Full and Half Bath Exterior LED TV ...
Updated: Thursday, October 15, 2026 09:11 AM
Seller: America Go RV - Seguin
Condition: New
Exterior Length: 36 ft
Sleeps: 5
Number of Slide Outs: 3
Fresh Water Tank Capacity: 98 gal
Stock Number: 361326
Description: NEW 2027 GRAND DESIGN MOMENTUM G-CLASS 320G – 361326
Grand Design Momentum G-Class 320G Highlights:
11' Separate Garage
Exclusive ...
Updated: Friday, September 25, 2026 03:31 AM
Seller: General RV Center
Condition: New
Exterior Length: 3 ft
Sleeps: 5
Number of Slide Outs: 3
Fresh Water Tank Capacity: 98 gal
Stock Number: 361949
Description: NEW 2027 GRAND DESIGN MOMENTUM G-CLASS 320G – 361949
Grand Design Momentum G-Class 320G Highlights:
11' Separate Garage
Exclusive ...
Updated: Monday, August 17, 2026 10:16 AM
Seller: General RV Center
Condition: New
Exterior Length: 3 ft
Sleeps: 5
Number of Slide Outs: 3
Fresh Water Tank Capacity: 98 gal
Stock Number: 361950
Description: NEW 2027 GRAND DESIGN MOMENTUM G-CLASS 320G – 361950
Grand Design Momentum G-Class 320G Highlights:
11' Separate Garage
Exclusive ...
Updated: Monday, August 17, 2026 10:16 AM
Seller: General RV Center
Condition: New
Exterior Length: 36 ft
Sleeps: 5
Number of Slide Outs: 3
Fresh Water Tank Capacity: 98 gal
Stock Number: 361328
Description: NEW 2027 GRAND DESIGN MOMENTUM G-CLASS 320G – 361328
Grand Design Momentum G-Class 320G Highlights:
11' Separate Garage
Exclusive ...
Updated: Friday, September 25, 2026 03:31 AM
Seller: General RV Center - Draper
Condition: New
Exterior Length: 36 ft
Sleeps: 5
Number of Slide Outs: 3
Fresh Water Tank Capacity: 98 gal
Stock Number: 367930
Description: NEW 2027 GRAND DESIGN MOMENTUM G-CLASS 320G – 367930
Grand Design Momentum G-Class 320G Highlights:
11' Separate Garage
Exclusive ...
Updated: Tuesday, October 06, 2026 06:00 AM
Seller: General RV Center - West Chester
New 2026 GRAND DESIGN MOMENTUM G CLASS 320G
Georgetown, Kentucky
MSRP$136,778 USD $94,995
Condition: New
Exterior Length: 36 ft 3 in
Sleeps: 5
Number of Slide Outs: 3
Gross Vehicle Weight: 16,400 lb
Number of Axles: Tandem
Description: New 2026 Grand Design Momentum G-Class 320G
Details: Grand Design Momentum G-Class toy hauler 320G highlights: 11' Separate Garage Bath and a Hal...
Updated: Thursday, September 24, 2026 06:54 AM
Seller: Blue Compass RV - Lexington
Condition: New
Exterior Length: 36 ft 3 in
Fresh Water Tank Capacity: 98 gal
Stock Number: 46115
VIN: 573FM3822TBB04371
Exterior Width: 8 in
Description: Overview Elevate Your Explorations with the 2026 Grand Design Momentum G-Class 320G: Luxury Meets Adventure! The 2026 Grand Design Momentum G-Class...
Updated: Tuesday, October 13, 2026 03:37 PM
Seller: RV Country - Mt Vernon, WA
Condition: Used
Exterior Length: 36 ft 3 in
Sleeps: 5
Number of Slide Outs: 3
Gross Vehicle Weight: 16,400 lb
Number of Axles: Tandem
Description: Used 2025 Grand Design Momentum G-Class 320G
Details: Grand Design Momentum G-Class toy hauler 320G highlights: 11' Separate Garage Bath and a Ha...
Updated: Tuesday, August 25, 2026 07:36 AM
Seller: Blue Compass RV - Delaware
Used 2020 GRAND DESIGN MOMENTUM G CLASS 320G
Chippewa Falls, Wisconsin
USD $47,995
View Floor Plan
Condition: Used
Exterior Length: 36 ft 3 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 16,800 lb
Number of Axles: Tandem
Description: Used 2020 Grand Design Momentum G-Class 320G
Details: Grand Design Momentum G-Class toy hauler 320G highlights: 11' Separate Garage Bath and a Ha...
Updated: Tuesday, October 13, 2026 07:58 AM
Seller: Markquart RV - Chippewa Falls
Condition: New
Sleeps: 6
Number of Slide Outs: 2
Fresh Water Tank Capacity: 140 gal
Stock Number: 361953
VIN: 573FM3721VBB05998
Description: NEW 2027 GRAND DESIGN MOMENTUM G-CLASS 325G – 361953
Grand Design Momentum G-Class 325G Highlights:
• 15‑foot garage with rollover sofas...
Updated: Monday, August 17, 2026 10:16 AM
Seller: General RV Center
Condition: New
Exterior Length: 35 ft
Sleeps: 6
Number of Slide Outs: 2
Fresh Water Tank Capacity: 140 gal
Stock Number: 359493
Description: NEW 2027 GRAND DESIGN MOMENTUM G-CLASS 325G – 359493
Grand Design Momentum G-Class 325G Highlights:
• 15‑foot garage with rollover sofas...
Updated: Friday, September 25, 2026 03:31 AM
Seller: General RV Center - Draper
Condition: New
Exterior Length: 35 ft 6 in
Fresh Water Tank Capacity: 160 gal
Stock Number: 47490
VIN: 573FM3727TBB05694
Exterior Width: 8 in
Description: Overview Welcome Aboard the 2026 Grand Design Momentum G-Class 325G: Redefining Travel with Every Mile! The 2026 Grand Design Momentum G-Class 325G...
Updated: Tuesday, October 13, 2026 03:38 PM
Seller: RV Country - Fresno
Condition: New
Exterior Length: 35 ft 6 in
Fresh Water Tank Capacity: 160 gal
Stock Number: 46925
Exterior Color: White
VIN: 573FM3722TBB05196
Description: Overview Venture into Luxury with the 2026 Grand Design Momentum G-Class 325G: Your Home on the Open Road! Welcome to a new era of travel with the ...
Updated: Tuesday, October 13, 2026 03:37 PM
Seller: RV Country - Fife, WA
Condition: New
Exterior Length: 35 ft 6 in
Fresh Water Tank Capacity: 160 gal
Stock Number: 46368
VIN: 573FM3729TBB04675
Exterior Width: 8 in
Description: Overview Discover the 2026 Grand Design Momentum G-Class 325G: Where Every Journey Becomes an Unforgettable Experience! Step into the world of luxu...
Updated: Tuesday, October 13, 2026 03:37 PM
Seller: RV Country - Laughlin, NV
Condition: New
Exterior Length: 39 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 18,000 lb
Number of Axles: Tandem
Description: New 2027 Grand Design Momentum G-Class 350G
Details: Grand Design Momentum G-Class toy hauler 350G highlights: Theater Seating Bath and a Half 14...
Updated: Monday, October 05, 2026 12:22 PM
Seller: Blue Compass RV - Columbia
New 2027 GRAND DESIGN MOMENTUM G CLASS 350G
Arkansaw, Wisconsin
MSRP$152,668 USD $105,494
Condition: New
Exterior Length: 39 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Gross Vehicle Weight: 18,000 lb
Number of Axles: Tandem
Description: New 2027 Grand Design Momentum G-Class 350G
Details: Grand Design Momentum G-Class toy hauler 350G highlights: Theater Seating Bath and a Half 14...
Updated: Tuesday, October 13, 2026 07:58 AM
Seller: Dick's RV
Condition: New
Exterior Length: 39 ft
Sleeps: 6
Number of Slide Outs: 3
Fresh Water Tank Capacity: 98 gal
Stock Number: 364092
Description: NEW 2027 GRAND DESIGN MOMENTUM G-CLASS 350G – 364092
## Grand Design Momentum G-Class 350G Highlights
* 14' 6" Separate Garage...
Updated: Tuesday, September 29, 2026 03:32 AM
Seller: General RV Center
Condition: New
Exterior Length: 39 ft
Sleeps: 6
Number of Slide Outs: 3
Fresh Water Tank Capacity: 98 gal
Stock Number: 364091
Description: NEW 2027 GRAND DESIGN MOMENTUM G-CLASS 350G – 364091
## Grand Design Momentum G-Class 350G Highlights
* 14' 6" Separate Garage...
Updated: Saturday, October 03, 2026 03:31 AM
Seller: General RV Center - Draper
New 2027 GRAND DESIGN MOMENTUM G CLASS 350G
Johnson City, Tennessee
MSRP$150,349 USD $104,995
Condition: New
Exterior Length: 39 ft 10 in
Sleeps: 6
Number of Slide Outs: 3
Number of Axles: Tandem
Fresh Water Tank Capacity: 98 gal
Description: Introducing the 2027 Grand Design Momentum 350G, a stunning fifth wheel designed for adventure and comfort. With a spacious length of 39.8 ft and a...
Updated: Thursday, October 08, 2026 01:59 PM
Seller: A & L RV Sales - Richmond
Condition: New
Exterior Length: 39 ft 9 in
Fresh Water Tank Capacity: 98 gal
Stock Number: 47711
VIN: 573FM4221VBB06162
Exterior Width: 8 in
Description:
Updated: Tuesday, October 13, 2026 03:39 PM
Seller: RV Country - Mt Vernon, WA
Condition: New
Exterior Length: 39 ft 9 in
Fresh Water Tank Capacity: 98 gal
Stock Number: 47613
VIN: 573FM4228VBB05896
Exterior Width: 8 in
Description:
Updated: Saturday, October 10, 2026 03:41 AM
Seller: RV Country - Fresno
New 2026 GRAND DESIGN MOMENTUM G CLASS 350G
Indianapolis, Indiana
MSRP$139,829 USD $104,995
Condition: New
Exterior Length: 39 ft 9 in
Sleeps: 6
Number of Slide Outs: 3
Gross Vehicle Weight: 18,000 lb
Number of Axles: Tandem
Description: New 2026 Grand Design Momentum G-Class 350G
Details: Grand Design Momentum G-Class toy hauler 350G highlights: Theater Seating Bath and a Half 14...
Updated: Saturday, October 10, 2026 06:50 AM
Seller: Blue Compass RV - Indy
Condition: New
Exterior Length: 39 ft 9 in
Sleeps: 6
Number of Slide Outs: 3
Gross Vehicle Weight: 18,000 lb
Number of Axles: Tandem
Description: New 2026 Grand Design Momentum G-Class 350G
Details: Grand Design Momentum G-Class toy hauler 350G highlights: Theater Seating Bath and a Half 14...
Updated: Tuesday, October 13, 2026 07:58 AM
Seller: King's Campers
Condition: New
Exterior Length: 39 ft 9 in
Sleeps: 6
Number of Slide Outs: 3
Gross Vehicle Weight: 18,000 lb
Number of Axles: Tandem
Description: New 2026 Grand Design Momentum G-Class 350G
Details: Grand Design Momentum G-Class toy hauler 350G highlights: Theater Seating Bath and a Half 14...
Updated: Saturday, October 10, 2026 06:49 AM
Seller: Blue Compass RV - Cincinnati
Condition: New
Exterior Length: 39 ft 9 in
Sleeps: 6
Number of Slide Outs: 3
Gross Vehicle Weight: 18,000 lb
Number of Axles: Tandem
Description: New 2026 Grand Design Momentum G-Class 350G
Details: Grand Design Momentum G-Class toy hauler 350G highlights: Theater Seating Bath and a Half 14...
Updated: Thursday, September 24, 2026 06:49 AM
Seller: Blue Compass RV - Delaware
