Toy Hauler
Grand Design RV Momentum M-Class 381ms
Compare specs across all model years (2022–2025)
4
Model Years
7
Sleeps
43' 11"
Length
20,000
Avg GVWR
Our Recommendation
Which Year Should You Buy?
2025 Momentum M-Class 381ms
Best Choice
Lightest GVWR (20,000 lbs) makes it towable by more vehicles. Highest Mint Score (29.9).
What Changed Year-Over-Year
2024
2025
More Compact
Length changed from 45' 6" to 43' 11".
2023
2024
Length Increased
Length changed from 43' 11" to 45' 6".
2022
2023
Tank Capacity Change
Fresh water capacity changed from 152 to 140 gallons.
All Model Years
Best Value
2025
2025 Grand Design RV Momentum M-Class 381ms
29.9
20,000 lbs GVWR
3,440 lbs Hitch
43' 11"
Sleeps 7
View Full Specs
Check Towing
2024
2024 Grand Design RV Momentum M-Class 381ms
29.9
20,000 lbs GVWR
3,440 lbs Hitch
45' 6"
Sleeps 7
View Full Specs
Check Towing
2023
2023 Grand Design RV Momentum M-Class 381ms
29.9
20,000 lbs GVWR
3,440 lbs Hitch
43' 11"
Sleeps 7
View Full Specs
Check Towing
2022
2022 Grand Design RV Momentum M-Class 381ms
29.6
20,000 lbs GVWR
3,440 lbs Hitch
43' 11"
Sleeps 7
Original model year
View Full Specs
Check Towing
Can Your Vehicle Tow the Momentum M-Class 381ms?
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.
Popular RV Upgrades
Based on what RV owners are buying
-11%
Prime
2.3K Super Quiet Generator
$396.00
$444.99
-32%
Prime
RV Cover
$189.99
$279.99
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