2027 Ember E-Series21RKE

Ember lists the 2027 E-Series 21RKE at 4,975 lb unloaded (UVW), with a GVWR of 6,695 lb, a cargo carrying capacity of 1,720 lb and a hitch weight of 535 lb. Its UVW plus its cargo capacity comes to exactly its GVWR.

It is 25' 3" long and 11' 2" high with the air conditioner, with 55 gal fresh, 35 gal grey, 35 gal black. Fresh water weighs about 8.3 lb per US gallon, so a full fresh tank uses roughly 457 lb of the cargo capacity before anything else is loaded.

Among the 12 E-Series floorplans Ember lists for 2027 with a published weight, it is number 6 by unloaded weight, in a range from 1,740 lb (12RK) to 6,130 lb (26ETS). Every figure in that comparison is Ember’s, for the same model year.

Every number on this page was read on 5 Nov 2026 from Ember’s own floorplan page for the E-Series 21RKE, whose structured data names the model year 2027.

How the 21RKE differs from the other eleven E-Series floorplans. Most distinctive first. How these ranks are worked out.

• Cargo capacity, 1,720 lb: third-largest of twelve, between the 12RK (1,710 lb) and the 21FBE (1,725 lb).
• Tongue weight, 535 lb: fourth-lightest of twelve, between the 18FBE (470 lb) and the 18RBE (540 lb).
• Cargo capacity as a share of GVWR, 25.7%: fifth-largest of twelve, between the 21FBE (25.4%) and the 18FBE (26%).
• Tongue weight as a share of dry weight, 10.8%: smallest of twelve, level with the 26ETS; next is the 22MLQ (11.1%).
• Dry weight, 4,975 lb: sixth-lightest of twelve, between the 19ETS (4,495 lb) and the 21FBE (5,070 lb).
• GVWR, 6,695 lb: sixth-lowest of twelve, between the 19ETS (5,995 lb) and the 21FBE (6,795 lb).
• Length, 25 ft 3 in: sixth-shortest of twelve, between the 19ETS (23 ft 4 in) and the 21FBE (25 ft 11 in).

Next to the 19ETS, the nearest lighter floorplan by dry weight, the 21RKE is 480 lb heavier by dry weight, has a GVWR 700 lb higher, has 220 lb more cargo capacity, has a tongue weight 80 lb lighter, is 1 ft 11 in longer and stands 1 in lower; the two publish the same fresh tank, grey tank and black tank.

Next to the 21FBE, the nearest heavier floorplan by dry weight, the 21RKE is 95 lb lighter by dry weight, has a GVWR 100 lb lower, has 5 lb less cargo capacity, has a tongue weight 45 lb lighter and is 8 in shorter; the two publish the same exterior height, fresh tank, grey tank and black tank.

Ember lists 12 E-Series floorplans for 2027; this site profiles every one with a published weight, from Ember’s own floorplan pages.

A full 55-gallon fresh tank is about 457 lb of water (water counts as cargo: 49 CFR 571.110 S9.3.2), 27% of the 21RKE’s 1,720 lb cargo capacity, leaving 1,264 lb (316 lb per rated berth). Across 12 E-Series floorplans the water share runs 13% to 31%, and 7 give up more than this one. Nearest on that share: E-Series 21FBE at 26% and E-Series 22MLQ at 27%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.110 S9.3.3).