2027 Forest River XLR Boost310BX

The XLR Boost 310BX leaves Forest River's factory at 11,519 lbs dry with 5,191 lbs of cargo capacity. Forest River publishes no GVWR for this line, so the loaded rating is not quoted on this page and is not computed from the other two figures. What the cargo number covers is defined by the factory: fresh water, gear, food, batteries and every dealer-installed accessory come out of it. Fresh water is 8.3 lb per gallon, so filling the 150-gallon fresh tank spends 1,245 lbs of the 5,191 lbs before anything else goes in.

Forest River’s 2027 floorplan drawing for the 310BX shows, at the front, a 66-by-80 king bed with a wardrobe, a dresser with a TV prep and washer/dryer prep, beside a bath with a tub shower, a medicine cabinet and linen storage. Mid-coach: a 10-cubic-foot 12-volt fridge, an L-shaped sofa in a slide, a kitchen and a 50-inch TV. At the rear: a 10-foot garage, 96 inches wide, with two roll-over sofas around a removable dinette table on a Euro bed system, a 5,000-lb tie-down and 3-season door prep, behind a 3,000-lb ramp door that doubles as a 1,500-lb patio deck. It draws one slide-out and a 21-foot awning. Outside it labels a 40-gallon fuel cell, generator prep and storage. Layouts change with options; check the unit itself.

Pin weight is 2,710 lbs, 24% of the dry weight as published; it rises as the trailer is loaded and comes off the truck’s payload, not its towing rating, so check it against the payload on your own door sticker (pin weight and payload).

Off hookups: 154 gallons of grey and black capacity against 150 gallons of fresh water, so fresh water runs out first (tank sizes by length).

Against the rest of the XLR Boost fifth-wheel roster this is the 2nd of 5 fifth wheels by dry weight, in a line that runs from 9,094 lbs to 13,074 lbs. It sits in the middle of the line by weight.

Plan the tow on loaded weight, not the 11,519 lbs dry figure: half the published cargo capacity brings this plan to about 14,115 lbs. Forest River publishes no loaded rating for this line, so the ceiling is the one on the trailer’s own weight label (how to read trailer weights).

Forest River’s line listing and this floorplan’s own factory page agree on all 4 shared figures. No GVWR is published for this line, so dry plus cargo has no rating to check against. A missing row means Forest River does not publish that figure (how figures are verified).

Forest River publishes no written floorplan description for this plan; the layout described above is read off Forest River’s own floorplan drawing for this model year. 310BX is a XLR Boost designation, and this site does not decode the code itself into a layout claim.

How the 310BX differs from the other four XLR Boost fifth wheels. Most distinctive first. Sibling pages may cover other model years than this one (2027). How these ranks are worked out.

• Dry weight, 11,519 lb: second-lightest of five, between the 286B (9,094 lb) and the 375BX (11,944 lb).
• Cargo capacity, 5,191 lb: second-largest of five, between the 286B (5,000 lb) and the 366BX (5,300 lb).
• Pin weight as a share of dry weight, 23.5%: second-largest of five, between the 363BX (23.2%) and the 366BX (24.6%).
• Length, 36 ft 2 in: second-shortest of five, between the 286B (31 ft 4 in) and the 363BX (40 ft 6 in).
• Pin weight, 2,710 lb: third-lightest of five, between the 375BX (2,620 lb) and the 363BX (2,795 lb).

Next to the 286B (2026 page), the nearest lighter floorplan by dry weight, the 310BX is 2,425 lb heavier by dry weight, has 191 lb more cargo capacity, has a pin weight 620 lb heavier, is 4 ft 10 in longer, stands 1 in taller, has a fresh tank 48 gal larger, has a grey tank 6 gal larger and has a black tank 8 gal larger.

Next to the 375BX, the nearest heavier floorplan by dry weight, the 310BX is 425 lb lighter by dry weight, has 515 lb more cargo capacity, has a pin weight 90 lb heavier and is 9 ft 1 in shorter; the two publish the same exterior height, fresh tank, grey tank and black tank.

Nine 2027 XLR Boost floorplans with a full factory record, read from Forest River on 2 Nov 2026. They run 6,758 to 13,074 lb dry on lengths of 28 feet 6 inches to 45 feet 3 inches, with hitch weights of 1,175 to 3,220 lb and cargo capacities of 4,072 to 5,300 lb. Forest River publishes no GVWR for these plans in this channel, so none is shown and none is computed.

A full 150-gallon fresh tank is about 1,245 lb of water, 24% of the 310BX’s 5,191 lb cargo capacity, leaving 3,946 lb. Across 5 XLR Boost fifth-wheel floorplans the water share runs 17% to 27%, and 2 give up more than this one. Nearest on that share: XLR Boost 366BX at 23% and XLR Boost 363BX at 26%.