2027 Keystone Carbon368

Keystone publishes three weights for the Carbon 368: a shipping weight of 13,636 lb, a carrying capacity of 3,064 lb and a hitch weight of 2,720 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 Carbon 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 94 gal fresh, 88 gal gray and 88 gal waste, as Keystone lists them. Fresh water weighs about 8.3 lb per US gallon, so a full fresh tank is roughly 780 lb on the road before anything else is loaded. The tire size Keystone lists is ST235/80R16G; 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 6 Carbon floorplans profiled here, this one is the 5th by Keystone’s shipping weight, in a range from 11,085 lb (310) to 15,370 lb (420). 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 5 Nov 2026 from Keystone’s own floorplan page for the Carbon 368. That page carries no model year, so the year comes from the roster page that links it, which lists the Carbon floorplans under the heading “2027 Floorplans” (this floorplan sits beyond the cards the page renders, and the heading’s own count equals the roster’s full list of floorplan pages). Keystone notes that its website reflects the most recent production run and that features and specifications change during the year.

How the 368 differs from the other five Carbon floorplans. Most distinctive first. How these ranks are worked out.

• Carrying capacity (Keystone’s term), 3,064 lb: smallest of six; next is the 363 (4,175 lb).
• Hitch weight as a share of shipping weight, 19.9%: smallest of six; next is the 310 (21.5%).
• Shipping weight (Keystone’s term), 13,636 lb: second-heaviest of six, between the 363 (12,500 lb) and the 420 (15,370 lb).
• Length, 40 ft 7 in: shared with the 363; of six, three shorter and one longer, nearest the 361LT (39 ft 11 in) and the 420 (44 ft 11 in).
• Sleeping capacity, 7: largest of six, level with the 361LT and 420; next are the 310, 330 and 363 (6).
• Hitch weight as Keystone lists it, 2,720 lb: shared with the 363; of six, two lighter and two heavier, nearest the 361LT (2,605 lb) and the 330 (2,765 lb).

Next to the 363, the nearest lighter floorplan by shipping weight, the 368 is 1,136 lb heavier by shipping weight, has 1,111 lb less carrying capacity and sleeps one more; the two publish the same hitch weight, length, exterior height, fresh tank and grey tank.

Next to the 420, the nearest heavier floorplan by shipping weight, the 368 is 1,734 lb lighter by shipping weight, has 1,566 lb less carrying capacity, has a hitch weight 625 lb lighter and is 4 ft 4 in shorter; the two publish the same exterior height, fresh tank, grey tank and sleeping capacity.

Keystone lists 6 Carbon floorplans for 2027. 6 have a complete Keystone figure set and no existing page here, and are profiled, from 11,085 lb to 15,370 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.