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The Zion from Roadtrek is a Class B camper van built on a Ram ProMaster 3500 extended chassis in Cambridge, Ontario. Most camper vans fill the middle of the floor with a dinette, cabinets, or a fixed bed. The Zion doesn’t. Two power sofas run along the walls at the back, and the floor between them stays open, so you can roll in bikes, kayaks, paddleboards, or a cooler and strap them down for the drive.
At night those same sofas become two twin beds or one king bed. The van seats five, sleeps up to three with an optional cab mattress, and still fits a full galley and a wet bath in under 21 feet. It’s a good example of a layout built around how its owners actually spend their days, not just how they sleep.
An Open Center Aisle Instead of a Dinette
The floor plan above shows the idea. Behind the cab, the wet bath sits on the driver’s side and the galley on the passenger side. Past them, two sofas face each other across an aisle about 28.7 inches wide. A small table can sit between them for meals, but when it’s stowed, that strip of floor runs almost the whole length of the coach.
That matters more than it sounds. In most vans, bikes end up on a hitch rack, where they collect road grime and need a lock at every stop. Inside the Zion, gear rides in the dry and out of sight. The trade-off is that you’ll unload or shuffle things before you set up the bed. For a weekend of riding or paddling, that’s an easy deal to make.
Built on the Ram ProMaster 3500
The Zion rides on a Ram ProMaster 3500 with a 159-inch extended wheelbase, a 280-horsepower 3.6L V6, and a 9-speed automatic. It’s about 20’9″ long, 6’11” wide without mirrors, and 9’5″ tall with the rooftop air conditioner. That’s long enough for a real bathroom while still driving and parking much like a large van, not a motorhome. That’s the main reason many buyers choose a Class B. The ProMaster’s front-wheel drive also keeps the floor low, so the step in is easier than in many vans.
Made for Camp, Not Just the Road
Outside, the Zion carries a 13-foot power awning, three power steps (two at the cab, one at the side door), and heavy-duty bug screens on both the sliding door and the rear doors. With the back doors open and screened, the open aisle becomes a breezy hangout on warm nights. An outdoor shower lets you rinse off sandy feet, muddy bikes, or a wetsuit before anything comes inside.
Two Ways to Sleep: Twin Beds or a King
The rear sofas are powered and have seatbelts. At night, each side lays flat into its own twin bed: about 39 inches wide on the driver’s side and 24 inches on the passenger side. The narrower bed works for a kid or for someone who likes to keep gear on the other side. Fill the aisle between them and the two become one king bed about 70 inches wide.
An optional folding mattress (about $400) bridges the front captain’s chairs for a third sleeper. It’s a smart use of space that sits empty in most vans overnight, though at about 33 inches wide, it’s best for a child or a short-term guest.
The Optional Forward-Facing Sofa
Roadtrek also offers the Zion with a forward-facing rear sofa (about $773 extra), shown in the photos below. This swaps the two long side sofas for one bench across the back, plus short side seats. Passengers ride facing forward, which many people find more comfortable on long drives, and the sofa still folds into a bed. You give up some of the open floor in exchange, so it comes down to whether you’re hauling more people or more gear.
A Galley Built for Real Cooking
The galley runs along the passenger side, so the cook is near the sliding door and the outdoor table. It has a 5.3 cubic foot refrigerator, a propane stove (an induction cooktop is about $307 more), a microwave, and a flip-up counter extension with a charging station. A slide-out pantry and a deep pot drawer give you room for real groceries, not just snacks. A Firefly touchscreen controls lights, tanks, batteries, and climate from one place.
A Wet Bath Behind the Driver’s Seat
Across from the galley is a wet bath with a marine toilet, a sink, and a shower. In a wet bath, the whole room is the shower stall, so you’ll wipe it down after use. It’s a trade-off for not having to rely on campground restrooms. Placing it up front by the cab also keeps the back of the van free for sleeping and gear.
Power, Heat, and Water Off the Grid
Roadtrek built the Zion for camping without hookups. It has 300 watts of roof solar and a 600 amp-hour lithium battery bank (a 660 amp-hour Lithionics system is a $6,625 upgrade). The Truma heater puts out 11,500 BTU/h, and a Truma AquaGo heats water on demand. Both run on a 5.9-gallon propane tank. The tanks hold about 33 gallons of fresh water, 14 gallons of gray, and 8.5 gallons of black, which is enough for a few days of careful use. Hookups and service connections are grouped in an exterior bay. The Truma rooftop AC (13,500 BTU) is mainly for campgrounds with shore power.
Design Details
- Builder: Roadtrek, Cambridge, Ontario
- Model: 2027 Zion Class B camper van (a high-roof Zion SL that sleeps five is also offered)
- Chassis: Ram ProMaster 3500, 159″ extended wheelbase, 3.6L V6 (280 hp), 9-speed automatic, 24-gallon fuel tank
- Size: about 20’9″ long, 6’11” wide (without mirrors), 9’5″ tall with the roof AC; about 6’2″ interior standing height
- Center aisle width: about 28.7″
- Seats: 5; sleeps: up to 3 (with the optional front folding mattress)
- Beds: rear power sofas convert to twin beds (about 39″ and 24″ wide) or a king bed (about 70″ wide)
- Kitchen: 5.3 cu ft fridge, propane stove (induction optional), microwave, slide-out pantry, pot drawer
- Bathroom: wet bath with marine toilet, sink, and shower; outdoor shower
- Water: about 33 gallons fresh, 14 gallons gray, 8.5 gallons black; Truma AquaGo on-demand water heater
- Power: 300 watts of solar, 600 Ah lithium battery bank (660 Ah optional), 30-amp shore power
- Climate: Truma 13,500 BTU rooftop AC, Truma 11,500 BTU/h propane furnace
- Weight: about 9,350 lb GVWR; about 1,660 lb occupant and cargo capacity
- Options: forward-facing rear sofa, cab folding mattress, induction stove, Thule roof rack/ladder/bike rack package
- Price: listed at $154,325 USD (Zion SL: $159,375)
What Makes This Van Special
- Gear rides inside. The open aisle keeps bikes and boats out of the weather and away from thieves, which a hitch rack can’t do.
- One space, three jobs. The same sofas work as seating by day, twin beds, or a king, so no floor space sits unused.
- The cab gets used, too. The optional mattress turns the front seats into a bed overnight.
- A real bathroom in a van. Putting the wet bath up front keeps the back open for sleeping and gear.
- Four-season systems. Lithium power, solar, propane heat, and on-demand hot water let you camp well past summer.
Things to Consider
- The roughly 1,660 lb occupant and cargo capacity has to cover people, water, and gear. A full fresh tank alone weighs about 275 lb.
- The narrow passenger-side twin bed (about 24 inches) is snug for most adults.
- At 9’5″ tall, check clearance for parking garages and drive-throughs.
- A wet bath saves space but takes some getting used to.
Comparing Class B vans? See Winnebago’s Solis Pocket 36A on a Ram ProMaster and Tommy Camper Vans’ four layouts explained. For a look at an earlier Roadtrek, check out this couple’s 1999 Dodge Roadtrek camper van.
Learn More
Roadtrek Zion
Model page: roadtrek.com/models/2027-zion
Contact: roadtrek.com/contact-us · info@roadtrekinc.com · 519-745-1160
Instagram: @roadtrekinc
Virtual tour and brochure: on the Zion model page
Photos and floor plans: Roadtrek. Pricing and specs as listed on roadtrek.com in October 2026.
Highlights
- Class B camper van on a Ram ProMaster 3500 extended chassis
- Open center aisle (about 28.7 inches) for bikes, kayaks, and gear
- Power side sofas convert to twin beds or a king bed
- Optional forward-facing sofa and cab bed for a third sleeper
- Galley with fridge, stove, microwave, and slide-out pantry
- Wet bath plus outdoor shower
- 300 watts of solar, lithium batteries, and Truma heat and AC
Explore More
- Winnebago’s Solis Pocket 36A: A 17’10” Class B on a Ram ProMaster
- Tommy Camper Vans’ 4 Layouts Explained
- Pleasure-Way Tofino Pop Top Camper Van
- 9 Van Conversions Built for the Open Road
- Van Life
Would you choose an open gear aisle or more built-in furniture in your camper van? Tell us in the comments.
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Disclosure: This post may contain affiliate links. If you purchase through one of our links, we may earn a commission at no additional cost to you.
Alex
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