Forest River Berkshire XL 40B

Name: Forest River Berkshire XL 40B
Brand: Forest River

Class Abuilt 2017–18Mixed build tierPatient search on the used market

WHAT ONE COSTS

$181,600est. used (2018, 8 yr old)

Sticker was $317,847 in 2018. Out of production since 2018, so the used market is the only way to buy one. Estimate assumes a 2018 unit.

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

1× King bed in bedroom slide(Permanent)72×80
1× 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

Patient search: weeks of watching, and probably some travel. Why: Forest River is a volume manufacturer; only 2 model years. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

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

OTHER BERKSHIRE FLOORPLANS

34B · 32,400 lb · sleeps 5 34QS · 32,400 lb · sleeps 7 360FWS · 28,000 lb · sleeps 4 360QS · 28,000 lb · sleeps 5 38A · 33,350 lb · sleeps 5 390BH · 27,910 lb · sleeps 6 390QS · 28,000 lb · sleeps 5 390RB · 27,910 lb · sleeps 5 39A · 33,400 lb · sleeps 5 39B · 33,400 lb · sleeps 7 400BH · 29,500 lb · sleeps 5 40F · 37,320 lb · sleeps 7 XL 37A · 38,320 lb · sleeps 4 XL 37B · 38,320 lb · sleeps 6 the whole line →

Find one for sale

Live listings for the XL 40B on the big marketplaces. Each search opens pre-filled with this exact floorplan:

RV Trader ↗Camping World ↗FB Marketplace ↗Google ↗

Inventory varies by site and day. Slim pickings? search the whole Berkshire line ↗

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, switch on your hard limits, and watch the whole market re-rank around them. Every exclusion explained, every margin shown.

See where it ranks for you →

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