2027 Keystone Carbon310

Keystone publishes three weights for the Carbon 310: a shipping weight of 11,085 lb, a carrying capacity of 5,295 lb and a hitch weight of 2,380 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 44 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 1st 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 310. 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 310 differs from the other five Carbon floorplans. Most distinctive first. How these ranks are worked out.

• Shipping weight (Keystone’s term), 11,085 lb: lightest of six; next is the 361LT (11,835 lb).
• Carrying capacity (Keystone’s term), 5,295 lb: largest of six; next is the 361LT (4,765 lb).
• Hitch weight as Keystone lists it, 2,380 lb: lightest of six; next is the 361LT (2,605 lb).
• Hitch weight as a share of shipping weight, 21.5%: second-smallest of six, between the 368 (19.9%) and the 363 and 420 (21.8%).
• Length, 35 ft 11 in: shortest of six, level with the 330; next is the 361LT (39 ft 11 in).
• Sleeping capacity, 6: smallest of six, level with the 330 and 363; next are the 361LT, 368 and 420 (7).

Next to the 361LT, the nearest heavier floorplan by shipping weight, the 310 is 750 lb lighter by shipping weight, has 530 lb more carrying capacity, has a hitch weight 225 lb lighter, is 4 ft shorter and sleeps one fewer; the two publish the same exterior height, fresh tank and grey tank.

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.