CamperHardlyKnowHer

Forest River Berkshire XL 40B

Class Abuilt 2017–18Mixed build tierFindable on the used market
WHAT ONE COSTS
price not published

The maker never published an MSRP for this floorplan. Unknown is not cheap — treat any asking price against comparable models, not against zero.

THE SPECS
Length41.0 ft
Height (incl. A/C)12.4 ft
Width8.3 ft
GVWR33,000 lb
Dry weightnot published
Sleeps4
Slide-outs4
Fresh water103 gal
Grey water66 gal
Black water42 gal
Air conditioning30,000 BTU
Fuel100 gal
Engine / chassisFreightliner XCR raised rail, Cummins ISL turbo diesel 380 hp, Allison 6-speed
Generator8 kW Onan diesel generator

A missing row means the maker never published that figure — unknown, not zero.

WHERE PEOPLE SLEEP
  • King bed in bedroom slide(Permanent)72×80
  • Sofa bed(Convertible)
HOW IT'S BUILT — 4/5
WallsAzdel composite
FrameSteel
RoofStandard
UnderbellyEnclosed

Forest River (Mixed tier): Forest River

YEAR BY YEAR — WHAT CHANGED
  • 2017Introduced
  • 2018Final model year
FINDING ONE

Findable — a few listed nationwide most weeks. Why: Forest River is a volume manufacturer; only 2 model years. Estimated from build volume and production span — not a count of live listings.

THE READ

Two-year XL variant of the 40A with a reworked galley and bath.

OTHER BERKSHIRE FLOORPLANS
Is the XL 40B your #1 — or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about — set your priorities as sliders and watch the whole market re-rank around them. Nothing gets hidden, everything gets explained.

Rank it against your setup →

Data compiled from dealer and aggregator listings, retrieved 2026-07.