2026 Forest River XLR Boost2115B

The XLR Boost 2115B leaves Forest River's factory at 6,758 lbs dry with 4,617 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 102-gallon fresh tank spends 847 lbs of the 4,617 lbs before anything else goes in.

Tongue weight is 1,175 lbs, 17% of the dry weight as published; it rises as the trailer is loaded and counts against the tow vehicle’s tongue-weight and payload limits (tongue weight by size).

Off hookups: 120 gallons of grey and black capacity against 102 gallons of fresh water, so fresh water runs out first (tank sizes by length).

Against the rest of the XLR Boost travel-trailer roster this is the 1st of 4 travel trailers by dry weight, in a line that runs from 6,758 lbs to 9,038 lbs. It is the lightest travel trailer in the line, which makes it the one to look at first if the tow vehicle is the constraint.

Plan the tow on loaded weight, not the 6,758 lbs dry figure: half the published cargo capacity brings this plan to about 9,066 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 floorplan description for this plan in the channel this page is built from - only the numeric specification block. Rather than describe a layout from the floorplan code, which would be a guess dressed as a fact, this page carries what the factory publishes and says where it stops. 2115B is a XLR Boost designation and this site does not decode it into a layout claim.

How the 2115B differs from the other three XLR Boost travel trailers. Most distinctive first. Sibling pages may cover other model years than this one (2026). How these ranks are worked out.

• Dry weight, 6,758 lb: lightest of four; next is the 2413B (7,328 lb).
• Tongue weight, 1,175 lb: lightest of four; next is the 2413B (1,200 lb).
• Length, 28 ft 6 in: shortest of four; next is the 2413B (30 ft).
• Cargo capacity, 4,617 lb: second-largest of four, between the 3012BX (4,522 lb) and the 2715B (5,107 lb).
• Tongue weight as a share of dry weight, 17.4%: second-largest of four, between the 3012BX (17.3%) and the 2715B (17.9%).
• Exterior height, 12 ft 6 in: lowest of four, level with the 2413B; next are the 2715B and 3012BX (12 ft 8 in).

Next to the 2413B, the nearest heavier floorplan by dry weight, the 2115B is 570 lb lighter by dry weight, has 545 lb more cargo capacity, has a tongue weight 25 lb lighter and is 1 ft 6 in shorter; the two publish the same exterior height, fresh tank, grey tank and black tank.

XLR Boost is the hardest of Forest River's toy-hauler rosters to read from the outside, for two reasons. It mixes classes: three published floorplans are XLR Boost travel trailers at 6,758 to 8,393 lb dry with 1,175 to 1,500 lb on the tongue, and three are XLR Boost or XLR Boost X fifth wheels at 9,094 to 13,074 lb dry with 2,090 to 3,220 lb on the pin. And Forest River publishes no GVWR for any of the eleven plans, so the loaded figure that determines whether a given truck can legally tow a given plan is not available from the factory in this channel. Cargo capacity is published, 2,507 to 5,300 lb, and dry weight is published, so what the roster tells you is what the trailer weighs empty and how much it will carry - not what it may weigh when full.

A full 102-gallon fresh tank is about 847 lb of water, 18% of the 2115B’s 4,617 lb cargo capacity, leaving 3,770 lb. Across 4 XLR Boost travel-trailer floorplans the water share runs 17% to 21%, and 2 give up more than this one. Nearest on that share: XLR Boost 2715B at 17% and XLR Boost 3012BX at 19%.