2027 Keystone Coleman18OG

Keystone publishes three weights for the Coleman 18OG: a shipping weight of 3,530 lb, a carrying capacity of 1,408 lb and a hitch weight of 538 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 Coleman 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 41 gal fresh, 34 gal gray and 34 gal waste, as Keystone lists them. Fresh water weighs about 8.3 lb per US gallon, so a full fresh tank is roughly 340 lb on the road before anything else is loaded. The tire size Keystone lists is ST235/75R15D.

Against the 9 Coleman floorplans profiled here, this one is the 4th by Keystone’s shipping weight, in a range from 2,483 lb (13R) to 6,094 lb (27B). 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 Coleman 18OG. That page carries no model year, so the year comes from the roster page that links it, which lists the Coleman 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 18OG differs from the other eleven Coleman floorplans. 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.

• Hitch weight as a share of shipping weight, 15.2%: second-largest of nine, between the 19B (14.2%) and the 13T (16.3%).
• Carrying capacity (Keystone’s term), 1,408 lb: third-smallest of nine, between the 13S (1,205 lb) and the 19B (1,460 lb).
• Shipping weight (Keystone’s term), 3,530 lb: fourth-lightest of nine, between the 13T (2,940 lb) and the 19R (4,114 lb).
• Hitch weight as Keystone lists it, 538 lb: fifth-lightest of nine, between the 23B (528 lb) and the 19R (556 lb).
• Exterior height, 9 ft 7 in: shared with the 13S; of twelve, one lower and nine taller, nearest the 13R (9 ft 6 in) and the 17B and 17R (9 ft 9 in).
• Length, 20 ft 5 in: shared with the 17B; of twelve, four shorter and six longer, nearest the 13B, 13R and two others (15 ft 11 in) and the 17R (20 ft 8 in).
• Fresh tank, 41 gal: largest of twelve, level with the 19B, 19R and three others; next are the 13B and 13R (28 gal).
• Sleeping capacity, 5: shared with the 17B; of twelve, six smaller and four larger, nearest the 13B, 13S and two others (4) and the 19B (7).

Next to the 13T, the nearest lighter floorplan by shipping weight, the 18OG is 590 lb heavier by shipping weight, has 532 lb less carrying capacity, has a hitch weight 58 lb heavier, is 4 ft 6 in longer, stands 8 in lower, has a fresh tank 20 gal larger and sleeps one more; the two publish the same grey tank.

Next to the 19R, the nearest heavier floorplan by shipping weight, the 18OG is 584 lb lighter by shipping weight, has 478 lb less carrying capacity, has a hitch weight 18 lb lighter, is 3 ft 6 in shorter, stands 1 ft 3 in lower and sleeps one more; the two publish the same fresh tank and grey tank.

Coleman is one of the four Coleman series Keystone builds, and Keystone lists 17 Coleman floorplans for 2027. 9 have a complete Keystone figure set and are profiled here, from 2,483 lb to 6,094 lb shipping weight; the others are catalogued below with the reason against each. Keystone publishes shipping weight, carrying capacity and hitch weight for these trailers, and no GVWR.

Closest sibling: the Coleman 19R, nearest on the published figures. It differs on 3 of the 5 fields both publish (this plan first): length 20 ft 5 in vs 23 ft 11 in; sleeps 5 vs 4; hitch weight 538 lb vs 556 lb. They match on fresh tank and grey tank.

All 12 Coleman floorplans: Coleman line hub.

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

Sourcing rules: methodology.