2027 Keystone Cougar Half-Ton21LBK

Keystone publishes three weights for the Cougar Half-Ton 21LBK: a shipping weight of 6,090 lb, a carrying capacity of 1,910 lb and a hitch weight of 760 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 Half-Ton 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, 80 gal gray and 40 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 ST225/75R15E.

Against the 11 Cougar Half-Ton floorplans profiled here, this one is the 1st by Keystone’s shipping weight, in a range from 6,090 lb (21LBK) to 9,590 lb (30REP). 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 Half-Ton 21LBK. That page carries no model year, so the year comes from the roster page that links it, which lists the Cougar Half-Ton 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 21LBK differs from the other six Cougar Half-Ton travel trailers. Most distinctive first. Each rank counts only the siblings that publish that field, and a figure most of them share is left out.

• Shipping weight (Keystone’s term), 6,090 lb: lightest of seven; next is the 22MLS (6,335 lb).
• Length, 25 ft 11 in: shortest of seven; next is the 22MLS (26 ft 5 in).
• Hitch weight as Keystone lists it, 760 lb: second-lightest of seven, between the 22MLS (700 lb) and the 25MLE (845 lb).
• Carrying capacity (Keystone’s term), 1,910 lb: third-smallest of seven, between the 22MLS (1,565 lb) and the 26LBW (2,400 lb).
• Sleeping capacity, 4: smallest of seven, level with the 22MLS; next are the 25FKD, 25MLE and three others (6).
• Hitch weight as a share of shipping weight, 12.5%: shared with the 29RLP; of seven, three smaller and two larger, nearest the 25MLE (12.1%) and the 26LBW (12.7%).

Next to the 22MLS, the nearest heavier floorplan by shipping weight, the 21LBK is 245 lb lighter by shipping weight, has 345 lb more carrying capacity, has a hitch weight 60 lb heavier, is 6 in shorter and has a grey tank 40 gal larger; the two publish the same exterior height, fresh tank and sleeping capacity.

Keystone lists 15 Cougar Half-Ton floorplans for 2027. 11 have a complete Keystone figure set and no existing page here, and are profiled, from 6,090 lb to 9,590 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 Half-Ton 25MLE, nearest on the published figures. It differs on 3 of the 5 fields both publish (this plan first): length 25 ft 11 in vs 29 ft 11 in; sleeps 4 vs 6; hitch weight 760 lb vs 845 lb. They match on fresh tank and grey tank.

All 11 Cougar Half-Ton floorplans: Cougar Half-Ton line hub.

8 of the 18 fields this catalogue tracks are published for the 21LBK. Not published: dry weight, GVWR, cargo capacity (CCC), exterior width, interior height, black tank, slide count, axle count, awning, air conditioning.

Sourcing rules: methodology.