2027 Keystone Cougar360MBI

Keystone publishes three weights for the Cougar 360MBI: a shipping weight of 12,499 lb, a carrying capacity of 2,501 lb and a hitch weight of 2,200 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 Cougar 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 75 gal fresh, 76 gal gray and 38 gal waste, as Keystone lists them. Fresh water weighs about 8.3 lb per US gallon, so a full fresh tank is roughly 622 lb on the road before anything else is loaded. The tire size Keystone lists is ST235/80R16H; a fifth wheel puts its pin load into the truck bed, so it counts against the truck’s payload rather than its tow rating.

Against the 7 Cougar floorplans profiled here, this one is the 7th by Keystone’s shipping weight, in a range from 9,674 lb (260MLE) to 12,499 lb (360MBI). 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 19 Oct 2026 from Keystone’s own floorplan page for the Cougar 360MBI. That page carries no model year, so the year comes from the roster page that links it, which lists the Cougar 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 360MBI differs from the other eleven Cougar fifth wheels. Most distinctive first. Each rank counts only the siblings that publish that field, and a figure most of them share is left out. Not every one of these pages covers the same model years as this one (2027); each figure is the one its own page prints, so a rank compares pages, not one model year.

• Shipping weight (Keystone’s term), 12,499 lb: heaviest of twelve; next is the 350LLK (12,040 lb).
• Hitch weight as Keystone lists it, 2,200 lb: third-heaviest of twelve, between the 290RLS (2,060 lb) and the 350LLK (2,240 lb).
• Carrying capacity (Keystone’s term), 2,501 lb: fourth-largest of twelve, between the 320RDS (2,467 lb) and the 29BHL (2,655 lb).
• Length, 39 ft 3 in: longest of twelve, level with the 350LLK and 355FBS; next is the 364BHL (39 ft).
• Sleeping capacity, 10: largest of twelve, level with the 29BHL and 364BHL; next are the 23MLE, 26RKE and four others (6).
• Hitch weight as a share of shipping weight, 17.6%: shared with the 316RLS; of twelve, three smaller and seven larger, nearest the 355FBS (16.9%) and the 26RKE and 350LLK (18.6%).

Next to the 350LLK, the nearest lighter floorplan by shipping weight, the 360MBI is 459 lb heavier by shipping weight, has 459 lb less carrying capacity, has a hitch weight 40 lb lighter and sleeps six more; the two publish the same length, exterior height, fresh tank and grey tank.

Keystone lists 10 Cougar floorplans for 2027. 7 have a complete Keystone figure set and no existing page here, and are profiled, from 9,674 lb to 12,499 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 Cougar 364BHL, nearest on the published figures. It differs on 2 of the 5 fields both publish (this plan first): length 39 ft 3 in vs 39 ft 0 in; hitch weight 2,200 lb vs 2,380 lb. They match on sleeps, fresh tank and grey tank.

All 15 Cougar floorplans: Cougar line hub.

8 of the 18 fields this catalogue tracks are published for the 360MBI. Not published: dry weight, GVWR, cargo capacity (CCC), exterior width, interior height, black tank, slide count, axle count, awning, air conditioning.

Sourcing rules: methodology.