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Toy Hauler

Grand Design RV Momentum M-Class 349m

Grand Design RV Momentum M-Class 349m

Compare specs across all model years (2017–2024)

8
Model Years
8
Sleeps
40' 7"
Length
16,850
Avg GVWR
Our Recommendation
Which Year Should You Buy?
2022 Momentum M-Class 349m Best Choice

Highest Mint Score (30.9).

View 2022 Full Specs & Tow Guide →

What Changed Year-Over-Year

2023 2024

Weight Reduction

GVWR dropped from 17,000 to 16,800 lbs (200 lbs lighter), improving towability.

2022 2023

Tank Capacity Change

Fresh water capacity changed from 155 to 140 gallons.

2021 2022

Capacity Change

Sleeping capacity changed from 9 to 7.

All Model Years

Can Your Vehicle Tow the Momentum M-Class 349m?

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.

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Tip: Click a year to see the full specs, tow guidance, and recommended gear for that model year.

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Our mission is to help people make well-informed RV buying decisions, so they can leave the noise and screens behind, reconnect with family, and create unforgettable memories in the great outdoors.

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