Toy Hauler
Grand Design RV Momentum M-Class 351m
Compare specs across all model years (2018–2022)
5
Model Years
8
Sleeps
38' 6"
Length
16,740
Avg GVWR
Our Recommendation
Which Year Should You Buy?
2018 Momentum M-Class 351m
Best Choice
Lightest GVWR (16,500 lbs) makes it towable by more vehicles. Highest Mint Score (31.1).
What Changed Year-Over-Year
2021
2022
Capacity Change
Sleeping capacity changed from 9 to 7.
2018
2019
Weight Increase
GVWR increased from 16,500 to 16,800 lbs (300 lbs heavier).
All Model Years
2022
2022 Grand Design RV Momentum M-Class 351m
30.6
16,800 lbs GVWR
2,785 lbs Hitch
38' 6"
Sleeps 7
↓ Sleeps 2 fewer than 2021
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Check Towing
2021
2021 Grand Design RV Momentum M-Class 351m
29.1
16,800 lbs GVWR
2,785 lbs Hitch
38' 9"
Sleeps 9
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2020
2020 Grand Design RV Momentum M-Class 351m
29.6
16,800 lbs GVWR
2,785 lbs Hitch
38' 9"
Sleeps 9
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Check Towing
2019
2019 Grand Design RV Momentum M-Class 351m
29.6
16,800 lbs GVWR
2,785 lbs Hitch
38' 9"
Sleeps 9
↑ 300 lbs heavier than 2018
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Check Towing
Best Value
2018
2018 Grand Design RV Momentum M-Class 351m
31.1
16,500 lbs GVWR
2,785 lbs Hitch
38' 9"
Sleeps 7
Original model year
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Check Towing
Can Your Vehicle Tow the Momentum M-Class 351m?
Enter your truck specs to see if any of these model years fit your towing capacity—and which year gives you the most safety margin.
Tip: Click a year to see the full specs, tow guidance, and recommended gear for that model year.
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