Fifth Wheel
Grand Design RV Solitude 377mbs-r
Compare specs across all model years (2018–2021)
4
Model Years
8
Sleeps
40' 10"
Length
16,600
Avg GVWR
Our Recommendation
Which Year Should You Buy?
2020 Solitude 377mbs-r
Best Choice
Highest Mint Score (30.6).
What Changed Year-Over-Year
2020
2021
Capacity Upgrade
Sleeping capacity increased from 8 to 9 with layout improvements.
2018
2019
Weight Increase
GVWR increased from 16,000 to 16,800 lbs (800 lbs heavier).
All Model Years
2021
2021 Grand Design RV Solitude 377mbs-r
29.6
16,800 lbs GVWR
2,750 lbs Hitch
40' 10"
Sleeps 9
↑ Sleeps 1 more than 2020
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Best Value
2020
2020 Grand Design RV Solitude 377mbs-r
30.6
16,800 lbs GVWR
2,750 lbs Hitch
40' 10"
Sleeps 8
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2019
2019 Grand Design RV Solitude 377mbs-r
29.1
16,800 lbs GVWR
2,750 lbs Hitch
40' 10"
Sleeps 8
↑ 800 lbs heavier than 2018
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2018
2018 Grand Design RV Solitude 377mbs-r
29.4
16,000 lbs GVWR
2,750 lbs Hitch
40' 10"
Sleeps 8
Original model year
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Can Your Vehicle Tow the Solitude 377mbs-r?
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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