2027 Keystone Hideout Max31SUNROOM

Keystone publishes three weights for the Hideout Max 31SUNROOM: a shipping weight of 7,530 lb, a carrying capacity of 1,970 lb and a hitch weight of 815 lb. Those are Keystone’s own terms, and this page keeps them. Keystone does not call the first figure dry or unloaded weight, does not say the hitch figure is measured dry, and publishes no GVWR for any Hideout Max floorplan, so none of the three is renamed here and no loaded rating is worked out from them. The trailer’s own federal weight label, inside the door, is the document that carries its UVW, cargo capacity and GVWR.

Tank capacities are 54 gal fresh, 39 gal gray and 30 gal waste, as Keystone lists them. Fresh water weighs about 8.3 lb per US gallon, so a full fresh tank is roughly 448 lb on the road before anything else is loaded. The tire size Keystone lists is ST225/75R15D.

Against the 3 Hideout Max floorplans profiled here, this one is the 2nd by Keystone’s shipping weight, in a range from 7,340 lb (29HAVEN) to 8,325 lb (310XBR). Every figure in that comparison comes from the same Keystone page type for the same model year, so the comparison inside the series is like for like.

Every number on this page was read on 23 Oct 2026 from Keystone’s own floorplan page for the Hideout Max 31SUNROOM. That page carries no model year, so the year comes from the roster page that links it, which lists the Hideout Max floorplans under the heading “2027 Floorplans”. Keystone notes that its website reflects the most recent production run and that features and specifications change during the year.

How the 31SUNROOM differs from the other two Hideout Max floorplans. Most distinctive first. Each rank counts only the siblings that publish that field, and a figure most of them share is left out.

• Carrying capacity (Keystone’s term), 1,970 lb: smallest of three; next is the 29HAVEN (2,160 lb).
• Hitch weight as Keystone lists it, 815 lb: lightest of three; next is the 310XBR (955 lb).
• Hitch weight as a share of shipping weight, 10.8%: smallest of three; next is the 310XBR (11.5%).
• Exterior height, 11 ft 1 in: lowest of three; next are the 29HAVEN and 310XBR (11 ft 3 in).
• Shipping weight (Keystone’s term), 7,530 lb: second-lightest of three, between the 29HAVEN (7,340 lb) and the 310XBR (8,325 lb).
• Sleeping capacity, 4: second-smallest of three, between the 29HAVEN (3) and the 310XBR (8).

Next to the 29HAVEN, the nearest lighter floorplan by shipping weight, the 31SUNROOM is 190 lb heavier by shipping weight, has 190 lb less carrying capacity, has a hitch weight 240 lb lighter, is 2 ft longer, stands 2 in lower, has a grey tank 39 gal smaller and sleeps one more; the two publish the same fresh tank.

Next to the 310XBR, the nearest heavier floorplan by shipping weight, the 31SUNROOM is 795 lb lighter by shipping weight, has 860 lb less carrying capacity, has a hitch weight 140 lb lighter, stands 2 in lower and sleeps four fewer; the two publish the same length, fresh tank and grey tank.

Keystone lists 3 Hideout Max floorplans for 2027. 3 have a complete Keystone figure set and no existing page here, and are profiled, from 7,340 lb to 8,325 lb shipping weight; the others are catalogued on this page with the reason against each. Keystone publishes shipping weight, carrying capacity and hitch weight for these trailers, and no GVWR.

Closest sibling: the Hideout Max 310XBR, nearest on the published figures. It differs on 2 of the 5 fields both publish (this plan first): sleeps 4 vs 8; hitch weight 815 lb vs 955 lb. They match on length, fresh tank and grey tank.

All 3 Hideout Max floorplans: Hideout Max line hub.

8 of the 18 fields this catalogue tracks are published for the 31SUNROOM. Not published: dry weight, GVWR, cargo capacity (CCC), exterior width, interior height, black tank, slide count, axle count, awning, air conditioning.

Sourcing rules: methodology.