2021 Grand Design Momentum 399TH

Used Toy Hauler in Dorchester, South Carolina, 29437

$82,500.00
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Used 2021 Grand Design Momentum 399TH available in Dorchester, South Carolina
2021 Grand Design Momentum 399TH - Used Toy Hauler For Sale by Pop RVs in Dorchester, South Carolina features Air Conditioning, Leveling Jacks, Awning, Slideout
2021 Momentum 399TH by Grand Design from Pop RVs in Dorchester, South Carolina
Used 2021 Grand Design Momentum 399TH available in Dorchester, South Carolina

Unit Specs

  • Consignment
  • Reduced
  • Stock #464546
  • Year2021
  • ManufacturerGrand Design RV
  • Make Grand Design
  • ModelMomentum
  • Floorplan399TH
  • Type Toy Hauler
  • Secondary Type Fifth Wheel
  • ConditionUsed
  • Length39' 0"
  • Width8' 0"
  • Height13' 0"
  • Price $88,900.00
  • Sale Price $82,500.00
  • Need to know your payment? Use our RV Loan Calculator!
  • Interior ColorBrown
  • Exterior ColorWhite/black
  • Sleeps8
  • Water Capacity (Fresh)157 gal
  • Water Capacity (Grey)104 gal
  • Air Conditioners2
  • A/C Spec15,000 BTU
  • Slideouts3
  • Dry Weight15,900 lbs
  • # Axles3
Stock #464546 -

2021 Grand Design Momentum 399TH Toy Hauler with three slide-outs!

The 2021 Momentum (by Grand Design) 399TH begins its flow at the rear garage: a generous 13-foot cargo zone with tie-down rails and fold-up sofas that convert into sleeping or lounge space. This unit features a washer/dryer.

Moving forward, the main living/kitchen area opens to an island countertop and central sink, flanked by a full-size residential refrigerator and a three-burner cooktop on one side, with theater-style seating and an entertainment center opposite.

A mid-coach "bath & a half" setup offers a full main bath (shower, toilet, vanity) plus a secondary toilet compartment for convenience.

At the front lies the master suite featuring a slide-out queen, overhead storage, dual wardrobes, and a TV wall.

Three power slides expand the space, and dual awnings (including a patio deck) extend the indoor-outdoor living feel.

The Momentum 399TH blends toy-hauler practicality with upscale residential touches, ready for both adventure and comfort.

Please submit any and ALL offers - your offer may be accepted! Submit your offer today!

Reason for selling is new adventure!.

You have questions? We have answers. Call us at (941) 200-1030 to discuss this RV.

Selling your RV has never been easier. At Pop RVs, we literally sell thousands of units every year all over the country. Call (855) 273-7188 and we'll get started selling your RV today.

2021 Grand Design Momentum 399TH Features


  • Electrical
    Air Conditioning
  • Exterior
    Awning, Leveling Jacks, Slideout

2021 Grand Design Momentum 399TH Literature


2021 Momentum Brochure PDF 2021 Momentum Brochure 1
Seller Info

Pop RVs

5717 Bessie Drive
Sarasota, FL 34233

Member Since 2015

See 766 Reviews

Unit Specs

  • Consignment
  • Reduced
  • Stock #464546
  • Year2021
  • ManufacturerGrand Design RV
  • Make Grand Design
  • ModelMomentum
  • Floorplan399TH
  • Type Toy Hauler
  • Secondary Type Fifth Wheel
  • ConditionUsed
  • Length39' 0"
  • Width8' 0"
  • Height13' 0"
  • Price $88,900.00
  • Sale Price $82,500.00
  • Need to know your payment? Use our RV Loan Calculator!
  • Interior ColorBrown
  • Exterior ColorWhite/black
  • Sleeps8
  • Water Capacity (Fresh)157 gal
  • Water Capacity (Grey)104 gal
  • Air Conditioners2
  • A/C Spec15,000 BTU
  • Slideouts3
  • Dry Weight15,900 lbs
  • # Axles3

Unit Location

  • City Dorchester
  • State South Carolina
  • Zip 29437

Email Seller

Request More Info on this 2021 Grand Design Momentum 399TH Offered for sale by Pop RVs
Pop RVs
Pop RVs

5717 Bessie Drive
Sarasota, FL 34233

Phone: Click to Call

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2021 Grand Design Momentum 399TH Gallery

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Used 2021 Grand Design Momentum 399TH available in Dorchester, South Carolina
2021 Grand Design Momentum 399TH - Used Toy Hauler For Sale by Pop RVs in Dorchester, South Carolina features Air Conditioning, Leveling Jacks, Awning, Slideout
2021 Momentum 399TH by Grand Design from Pop RVs in Dorchester, South Carolina
Used 2021 Grand Design Momentum 399TH available in Dorchester, South Carolina