2026 Forest River Cascade18PBC

The Cascade 18PBC has 1,116 lbs of cargo capacity between 4,459 lbs dry and its 5,575 lbs GVWR, 20% of that rating; filling its 26-gallon fresh tank at 8.3 lb a gallon uses 216 lbs of it (how to read trailer weights).

Tongue weight is 475 lbs, 11% of the dry weight as published; it rises as the trailer is loaded and counts against the tow vehicle’s tongue-weight and payload limits (tongue weight by size).

Off hookups: 56 gallons of grey and black capacity against 26 gallons of fresh water, so fresh water runs out first (tank sizes by length).

Against the rest of the Cascade roster this is the 4th of 16 floorplans by dry weight, in a line that runs from 2,604 lbs to 11,327 lbs. It sits in the lighter third of the line.

Plan the tow on loaded weight, not the 4,459 lbs dry figure: half the published cargo capacity brings this plan to about 5,017 lbs, and the published GVWR of 5,575 lbs is the limit (how to read trailer weights).

Forest River’s line listing and this floorplan’s own factory page agree on all 4 shared figures. Dry weight plus cargo capacity equals the published GVWR exactly. A missing row means Forest River does not publish that figure (how figures are verified).

Forest River publishes no floorplan description for this plan in the channel this page is built from - only the numeric specification block. Rather than describe a layout from the floorplan code, which would be a guess dressed as a fact, this page carries what the factory publishes and says where it stops. 18PBC is a Cascade designation and this site does not decode it into a layout claim.

How the 18PBC differs from the other fifteen Cascade floorplans. Most distinctive first. How these ranks are worked out.

• Tongue weight as a share of dry weight, 10.7%: second-smallest of sixteen, between the 17SCC (10.3%) and the 17THHC and 26SSC (11.7%).
• Dry weight, 4,459 lb: fourth-lightest of sixteen, between the 17SCC (4,289 lb) and the 26LPC (4,558 lb).
• GVWR, 5,575 lb: fourth-lowest of sixteen, between the 17SCC (5,540 lb) and the 17MPHC (5,690 lb).
• Cargo capacity, 1,116 lb: fourth-smallest of sixteen, between the 17MPHC (811 lb) and the 14BHLPC (1,216 lb).
• Tongue weight, 475 lb: fourth-lightest of sixteen, between the 17SCC (440 lb) and the 26LPC (560 lb).
• Length, 23 ft 11 in: shared with the 17SCC; of sixteen, two shorter and twelve longer, nearest the 17LPC (22 ft 1 in) and the 17MPHC and 17THHC (26 ft 8 in).
• Exterior height, 10 ft 4 in: shared with the 17MPHC and 17THHC; of sixteen, two lower and eleven taller, nearest the 14BHLPC (10 ft 2 in) and the 17SCC and 26KFC (10 ft 5 in).
• Fresh tank, 26 gal: shared with the 14BHLPC, 17LPC and 17SCC; of sixteen, two smaller and ten larger, nearest the 17THHC (13 gal) and the 20OGC, 39DLC and 39TNC (40 gal).
• Grey tank, 28 gal: shared with the 14BHLPC, 17LPC and 17SCC; of sixteen, two smaller and ten larger, nearest the 17MPHC and 17THHC (12 gal) and the 23MSC, 26KFC and five others (38 gal).
• Black tank, 28 gal: shared with the 14BHLPC, 17LPC and two others; of sixteen, two smaller and nine larger, nearest the 17THHC (4.5 gal) and the 23MSC, 26KFC and four others (38 gal).
• Cargo capacity as a share of GVWR, 20%: shared with the 17LPC; of sixteen, six smaller and eight larger, nearest the 26SSC (19.7%) and the 27LHC (22.3%).

Next to the 17SCC, the nearest lighter floorplan by dry weight, the 18PBC is 170 lb heavier by dry weight, has a GVWR 35 lb higher, has 135 lb less cargo capacity, has a tongue weight 35 lb heavier and stands 1 in lower; the two publish the same length, fresh tank, grey tank and black tank.

Next to the 26LPC, the nearest heavier floorplan by dry weight, the 18PBC is 99 lb lighter by dry weight, has a GVWR 1,985 lb lower, has 1,886 lb less cargo capacity, has a tongue weight 85 lb lighter, is 5 ft 3 in shorter, stands 2 in lower, has a fresh tank 26 gal smaller and has a grey tank 10 gal smaller; the two publish the same black tank.

Cascade covers a wider span than any other Forest River travel-trailer line this site has catalogued: thirty-three published floorplans in five factory groupings - single axle, tandem axle, tandem-axle toy hauler, fish house and destination - running from 2,604 lb dry at 17 feet 3 inches to 11,327 lb at 42 feet 8 inches. Tongue weight runs 320 to 1,342 lb over that span. The grouping a plan belongs to predicts its class far better than its floorplan number does, so both are in the table below.

A full 26-gallon fresh tank is about 216 lb of water (water counts as cargo: 49 CFR 571.110 S9.3.2), 19% of the 18PBC’s 1,116 lb cargo capacity, leaving 900 lb. Across 16 Cascade floorplans the water share runs 8% to 32%, and 7 give up more than this one. Nearest on that share: Cascade 14BHLPC at 18% and Cascade 17THHC at 20%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.110 S9.3.3).