2026 Grand Design Reflection337RLS

The Reflection 337RLS is the rear-living couples’ coach a step up from the 303RLS — a longer fifth wheel with three slides, a rear tri-fold sofa and theater seating, a kitchen island and a private raised front bedroom. The extra length translates into a more open rear living area and, notably, a substantial payload. The Reflection residential build carries through: gel-coat fiberglass sidewalls, laminated aluminum framing, a one-piece TPO roof and a 16 cubic-foot 12-volt refrigerator.

It rides on a tandem axle with MORryde rubberized suspension and Goodyear Endurance tires, with a 13,995-pound GVWR on an 11,200-pound dry weight — leaving a generous 2,795 pounds of payload — and a 2,300-pound dry pin weight that wants a three-quarter-ton truck. A 74-gallon fresh tank, an 87-gallon gray and a 16 cubic-foot refrigerator support full-time stays, with the coach framed for a second air conditioner.

It sleeps four in a couples-first layout with one of the larger payloads in the line, at an MSRP near $92,400. For couples who want more rear-living space and real cargo headroom than the 303RLS and have a three-quarter-ton to tow it, the 337RLS is the comfortable middle of the full-size Reflection fifth wheels.

Grand Design's Reflection is the brand's premium-mainstream towable family, and it spans four sub-lines across both tow types. The full-size Reflection fifth wheel is the heart of the range — a residential half-ton-to-three-quarter-ton coach with a 16 cubic-foot refrigerator and laminated aluminum construction. The Reflection travel trailer (the "...TS" plans) brings that same finish to a genuine bumper-pull, for buyers who want Reflection quality without an in-bed hitch. The Reflection 150 Series is the lightest fifth wheel — CURT Touring Coil suspension, standard solar and a 90-degree turning pin box for short-bed half-tons — and the Reflection 100 Series is the accessible short-bed fifth-wheel entry. The 337RLS on this page is highlighted; each other profiled plan links to its own page. The full Reflection catalogue runs to dozens of floorplans across all four; the highest-demand layouts are detailed here and the rest are catalogued on the line hub.

This floorplan carries its water comfortably. A full 74-gallon fresh tank is roughly 22% of the 2,795-pound cargo capacity, leaving the 337RLS with a usable gear budget even when you tow full.

The published dry pin weight of 2,300 pounds is 21% of this floorplan’s 11,200-pound dry weight. Fifth-wheel pin weight rides in the bed of the truck, so it comes off payload rather than off tow rating — and it rises with the trailer as you load it, not in proportion to what you put over the axles.

Nothing above changes the ceiling. Loaded to its 13,995-pound GVWR the 337RLS is towing 2,795 pounds more than its 11,200-pound dry figure, and that is the number your vehicle has to be rated for — not the brochure weight.

Tank balance is generous here: 74 gallons of fresh against 87 grey and 47 black, so waste capacity keeps pace with supply and the fresh tank is the constraint that ends a dry stay.

Ranked by GVWR, the 337RLS sits 20 of 23 in the Reflection line: 13,995 pounds against a line that runs from 9,995 to 14,995 pounds. That position is the useful thing to know, because the plans immediately either side of it are the real alternatives.

Either side of it in the same line: Reflection 324MBS matches it exactly at 13,995 lb GVWR; and Reflection 360FLS is 1,000 pounds heavier at 14,995 lb GVWR.

3 other Reflection plans share this floorplan’s 13,995 lb GVWR, so the ranking above separates plans that tow to the same ceiling. On a shared chassis the figure that actually differs between them is cargo capacity and where the weight sits, not the rating.

Against the 337RLS: the Model Z 2670 is 6 ft shorter and sleeps 3 more; the Cougar 364BHL is 5 lb heavier and 3 ft longer and sleeps 6 more. Those are differences in the published numbers only — what they cost, how they are built and how they live are separate questions each of those pages answers on its own terms.

Those are the nearest fifth wheels from other lines by weight — one per line, picked by proximity on that figure and nothing else. They are listed so the same tow vehicle can be checked against real alternatives, not because they are equivalent inside; layout, build and price diverge sharply across that group.

For scale, the Reflection floorplans profiled here run 7,000 to 12,900 pounds dry and 27 to 41 feet of exterior length across 23 plans. Where a floorplan falls in that spread usually says more about which vehicle can tow it, and which site it fits, than the layout name does.

Every profiled floorplan in this line, with the full weight table, is on the Reflection line hub.

This catalog tracks 18 specification fields per floorplan. Named sources publish 16 of them for the 337RLS. The rest are not shown, because the alternative is reading a figure across from a sibling floorplan or from what the segment usually does — and a number nobody published is worth less than an admitted gap.

Not published for this floorplan: interior height, awning, tire size (a tire description is published, a size is not). If you find one of these in a manufacturer document for this plan, it belongs on this page.

The completeness figure at the foot of this page (100%) measures the same thing on the full field set: it is a measurement of how much this floorplan’s manufacturer publishes, not of how much research went into the page.

How every figure here was sourced and checked is set out on the methodology page.