New 2026 Forest River RV Sierra 3990FL Fifth Wheel

Huge Loft with Stairs! Kitchen Island!
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Floorplan Title
2026 3990FL Features and Options

Forest River Sierra 3990FL Fifth Wheel for Sale in Middlebury, IN

If you're searching for a large family fifth wheel in Indiana with multiple sleeping areas and residential comfort, the Forest River Sierra 3990FL is built to impress. Available now at Royal RV Center in Middlebury, IN, this spacious model is perfect for big families or hosting guests.

Sleeps Eight or More with Loft Space

This unique layout offers incredible sleeping capacity with:

  • Full and half lofts featuring bunk mats and storage
  • Rear master bedroom with king bed slide
  • Two tri-fold hide-a-bed sofas in the living area

Perfect for kids, guests, or extended family trips.

Front Living Room with Fireplace

Enjoy a dedicated front living area with:

  • Theater seating
  • Two sofa sleepers
  • 50" TV and fireplace

A great space to relax, entertain, or unwind after a long day.

Spacious Kitchen with Island

The central kitchen features:

  • Kitchen island with large sink
  • Free-standing dinette
  • 12V refrigerator and stove
  • Ample counter space and storage

Designed for easy meal prep and family dining.

Private Master Suite & Large Bath

The rear bedroom includes a king bed slide, while the bathroom offers a walk-in shower with seat for added comfort.

Built for Comfort & Durability

  • Welded aluminum frame with vacuum-bonded construction
  • Enclosed underbelly with armor protection
  • Electric leveling system for quick setup
  • Goodyear tires with 7,000 lb. axles

Premium Interior Features

  • Residential lighting and cabinetry
  • Rustic wood plank flooring
  • Memory foam mattress
  • Wi-Fi extender system

Available at Royal RV Center

Visit Royal RV Center in Middlebury, Indiana, proudly serving Indiana, Michigan, Ohio, and beyond, to explore the Forest River Sierra 3990FL fifth wheel and enjoy spacious, comfortable camping for the whole family.

 
 
What Our Customers Are Saying

Absolutely amazing and so kind!

Absolutely amazing and so kind! We have a hybrid travel trailer and we were getting tossed around traveling from the Denver area to Miles City Mt. During the trip we had a mishap with an hidden and illplaced clearance bar that resulted in roof damage and antenna damage. We called them from Douglas, Wy to see if they could at least install an anti-sway system. They were ready for us the minute we pulled - Lindsay
Price: $97,053
You Save: $32,058
Sale Price: $64,995
Royal RV Center
Location: Middlebury, IN
Stock# R054727
Location: Middlebury, IN
Stock# R054727
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2026 3990FL Specifications
Sleeps 8
Slides 5
Length 43 ft 6 in
Ext Width 8 ft
Ext Height 13 ft 4 in
Hitch Weight 2825 lbs
GVWR 15375 lbs
Dry Weight 12439 lbs
Cargo Capacity 2936 lbs
Fresh Water Capacity 50 gals
Grey Water Capacity 80 gals
Black Water Capacity 50 gals
Tire Size 16"
Furnace BTU 40000 btu
Available Beds King
Refrigerator Type 12V
Refrigerator Size 17 cu ft
Cooktop Burners 3
Number of Awnings 1
LP Tank Capacity 30 lbs
Water Heater Capacity 60000 gal
Water Heater Type On Demand Tankless
AC BTU 30000 btu
TV Info LR 50" Flat Screen TV
Awning Info 20' Electric w/LED Light Strip
Axle Count 2
Washer/Dryer Available Yes
Number of LP Tanks 2
Shower Type Shower w/Seat
VIN 4X4FSES27TJ054727
Fifth Wheel Inspection Checklist - Click to Learn More
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