2027 Keystone Sprinter3640RLP

Keystone publishes three weights for the Sprinter 3640RLP: a shipping weight of 12,780 lb, a carrying capacity of 3,220 lb and a hitch weight of 2,250 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 Sprinter 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 77 gal fresh, 84 gal gray and 84 gal waste, as Keystone lists them. Fresh water weighs about 8.3 lb per US gallon, so a full fresh tank is roughly 639 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 9 Sprinter floorplans profiled here, this one is the 4th by Keystone’s shipping weight, in a range from 11,441 lb (3520RDS) to 14,320 lb (3900DBL). 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 4 Nov 2026 from Keystone’s own floorplan page for the Sprinter 3640RLP. That page carries no model year, so the year comes from the roster page that links it, which lists the Sprinter 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 3640RLP differs from the other eight Sprinter floorplans. Most distinctive first. How these ranks are worked out.

• Hitch weight as a share of shipping weight, 17.6%: smallest of nine; next is the 3500RDB (18.2%).
• Carrying capacity (Keystone’s term), 3,220 lb: third-largest of nine, between the 3950SSP (2,715 lb) and the 3800FLB (3,225 lb).
• Hitch weight as Keystone lists it, 2,250 lb: third-lightest of nine, between the 3520RDS (2,240 lb) and the 3840LRK (2,370 lb).
• Length, 40 ft 5 in: third-shortest of nine, between the 3520RDS (39 ft 5 in) and the 3920DSL (42 ft 9 in).
• Shipping weight (Keystone’s term), 12,780 lb: fourth-lightest of nine, between the 3800FLB (12,775 lb) and the 3840LRK (12,910 lb).
• Sleeping capacity, 4: smallest of nine, level with the 3520RDS and 3840LRK; next are the 3500RDB and 3800FLB (6).
• Grey tank, 84 gal: shared with the 3500RDB, 3840LRK and 3950SSP; of nine, two smaller and three larger, nearest the 3520RDS and 3800FLB (78 gal) and the 3910RLQ (123 gal).

Next to the 3800FLB, the nearest lighter floorplan by shipping weight, the 3640RLP is 5 lb heavier by shipping weight, has 5 lb less carrying capacity, has a hitch weight 495 lb lighter, is 2 ft 7 in shorter, has a fresh tank 2 gal larger, has a grey tank 6 gal larger and sleeps two fewer; the two publish the same exterior height.

Next to the 3840LRK, the nearest heavier floorplan by shipping weight, the 3640RLP is 130 lb lighter by shipping weight, has 170 lb less carrying capacity, has a hitch weight 120 lb lighter, is 2 ft 5 in shorter and has a fresh tank 46 gal smaller; the two publish the same exterior height, grey tank and sleeping capacity.

Keystone lists 12 Sprinter floorplans for 2027. 9 have a complete Keystone figure set and no existing page here, and are profiled, from 11,441 lb to 14,320 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.