2027 Keystone Carbon330

Keystone publishes three weights for the Carbon 330: a shipping weight of 12,405 lb, a carrying capacity of 4,360 lb and a hitch weight of 2,765 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 3rd 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 330. 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 330 differs from the other five Carbon floorplans. Most distinctive first. How these ranks are worked out.

• Hitch weight as a share of shipping weight, 22.3%: largest of six; next is the 361LT (22%).
• Hitch weight as Keystone lists it, 2,765 lb: second-heaviest of six, between the 363 and 368 (2,720 lb) and the 420 (3,345 lb).
• Shipping weight (Keystone’s term), 12,405 lb: third-lightest of six, between the 361LT (11,835 lb) and the 363 (12,500 lb).
• Carrying capacity (Keystone’s term), 4,360 lb: third-smallest of six, between the 363 (4,175 lb) and the 420 (4,630 lb).
• Length, 35 ft 11 in: shortest of six, level with the 310; next is the 361LT (39 ft 11 in).
• Sleeping capacity, 6: smallest of six, level with the 310 and 363; next are the 361LT, 368 and 420 (7).

Next to the 361LT, the nearest lighter floorplan by shipping weight, the 330 is 570 lb heavier by shipping weight, has 405 lb less carrying capacity, has a hitch weight 160 lb heavier, is 4 ft shorter and sleeps one fewer; the two publish the same exterior height, fresh tank and grey tank.

Next to the 363, the nearest heavier floorplan by shipping weight, the 330 is 95 lb lighter by shipping weight, has 185 lb more carrying capacity, has a hitch weight 45 lb heavier and is 4 ft 8 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.