Interior view of The Bivy ProMaster 136 conversion showing built-in galley and under-bed storage Interior view of The Bivy ProMaster 136 conversion showing built-in galley and under-bed storage Interior view of The Bivy ProMaster 136 conversion showing built-in galley and under-bed storage

the LEGACY bivy

An Affordable Conversion with a Priceless Design.

Interior view of The Bivy ProMaster 136 conversion showing built-in galley and under-bed storage
ProMasters Are Great! But Here's Why We Don't Work on Them

ProMasters Are Great! But Here's Why We Don't Work on Them

We get asked about Ram ProMaster conversions regularly, and for good reason—they've been a popular budget option in the van life community for years. ProMasters are solid, capable vans with some real advantages like front-wheel drive traction and wide interiors. But at The Vansmith, we've made the strategic decision to focus exclusively on Mercedes Sprinters and Ford Transits. Here's why.

The Price Advantage Has Disappeared

The biggest reason people chose ProMasters was simple: they were significantly cheaper than Sprinters or Transits. That advantage has largely evaporated.

What Changed:

  • ProMaster pricing has increased substantially over the past few years
  • Ford has become much more competitive with Transit pricing and incentives
  • The price gap that once made ProMasters the clear budget choice is now minimal
  • When you factor in resale value, Transits often represent better long-term value

The Numbers Today:

A comparable Transit now costs only $3,000-$8,000 more than a ProMaster—a difference that's easily offset by the Transit's superior features, better resale value, and improved driving experience.

No 4x4 Option = Limited Adventure Capability

Colorado adventures demand capability, and more of our customers want the option to access remote locations and handle challenging conditions.

The Reality:

  • ProMaster only offers front-wheel drive—no AWD, no 4x4
  • While FWD performs surprisingly well in snow, it can't match AWD/4x4 for off-road access
  • Ford Transit offers intelligent AWD across the lineup
  • Mercedes Sprinter offers factory 4x4 options for serious off-road capability

For Colorado adventurers who want to access backcountry campsites, forest service roads, and remote locations, the lack of 4x4 capability is a significant limitation.

Why We Choose Ford Transit and Mercedes Sprinter

Ford Transit Benefits:

  • Excellent value proposition with competitive pricing
  • Intelligent AWD available across all models
  • Widespread service network throughout North America
  • Strong towing capability and reliability
  • Better highway driving experience

Mercedes Sprinter Benefits:

  • Maximum interior space and premium build quality
  • Available 4x4 for serious off-road capability
  • Excellent fuel economy and long-term reliability
  • Superior resale value
  • Most refined driving and living experience

What This Means for You

At The Vansmith, we believe in building adventure vans that our Colorado customers will love for years to come. By focusing on platforms that offer the best combination of value, capability, and long-term satisfaction, we can deliver conversions that truly enhance your adventure lifestyle.

Ready to explore your options?

Check Out Our Van Conversion Series

ProMasters are great vans—they're just not the right fit for what we do best. Let's build you something better.

Comparison Table

2025 Van Life Conversion Comparison

The Mercedes-Benz Sprinter, Ford Transit, and Ram ProMaster are all popular options in the full-size cargo van market, but each has its own strengths. The Sprinter offers a more luxurious experience with advanced technology and available 4x4, while the Transit provides a more utilitarian and affordable option with a focus on reliability. The ProMaster stands out for its spacious interior and affordable price, making it a popular choice for van life conversions.

Feature Mercedes-Benz Sprinter Ford Transit Ram ProMaster*
Logo Mercedes Logo Ford Logo RAM Logo
Price Range (USD) $50,830 – $84,328 $47,400 – $67,700 $44,960 – $64,680
Space & Payload Various wheelbases and high-roof options for large cargo and payload Multiple wheelbases, including extended, with ample space Wide interior, decent space but shorter length options
Drive RWD, AWD, and 4x4 available RWD and AWD available FWD only
Reliability & Maintenance Durable with diesel, but higher maintenance cost Highly reliable, easy and affordable to maintain Lower cost, less reliable long-term than Transit
Technology & Features MBUX system, voice control, advanced safety tech SYNC system, smartphone integration, safety assists Basic tech with optional upgrades
Fuel Economy (est.) 18–22 MPG (diesel) 14–17 MPG (gas) 13–15 MPG (gas)
Towing Capacity Up to 7,500 lbs Up to 7,500 lbs Up to 6,910 lbs
Interior Height Up to 79.1" (High Roof) Up to 81.5" Up to 86.0" (Super High Roof)
Resale Value High Moderate Lower
Best For Premium builds, off-grid, full-time travel Great value, service access, solid all-rounder Budget builds and wide layouts

LEGACY 2024 BUILD: THE BIVY+ ...

An Affordable Conversion with a Priceless Design.

For those looking to live the van life on a budget, this more affordable camper conversion for the Mercedes Sprinter 144 and Ford Transit 148 offers an incredible foundation. The Bivy is a great place to start your journey, providing a smart design outfitted with essentials that you can build upon.

 

All of our builds include the best materials available, and The Bivy is no exception. We don't skimp on the quality of our products, and every camper van conversion is carefully crafted at our shop in Boulder, Colorado.

 

*Final product may differ from pictures shown*

Savings without sacrifice

Everything you need and nothing you don't. A super-comfy elevated bed and a refined galley make The Bivy a highly versatile van conversion for the ProMaster 136, Sprinter 144 or Transit 148.

Storage for days

Perfect for quick weekend getaways, this conversion van will take you and all your gear to your favorite crag, trailhead or mountain. After a hard day of play, your vacation home on wheels will be waiting for you to continue the journey.

Kitchen convenience

A beautiful platform for beautiful meals. Plenty of storage in the cabinets for your best cutlery and room in the cooler for perishables and beer.

 

*Fridge available via upgrade*

Power

The Vansmith's simple electrical systems is enough to get you running and is easy to use. Complement that battery with solar power and you will never be running on "E." The LED lights throughout make this budget-friendly camper van feel like a home away from it all. 

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Sample Color Renders

The Vansmith BIVY van Layout The Vansmith BIVY van Layout The Vansmith BIVY van Layout
The Vansmith BIVY van Layout

*Actual dimensions of build vary with chosen van*  

What's Included

  • Cabinetry

  • Seating

  • Electrical System

  • Water System

  • Climate Control

  • Exterior

  • Finishes

  • 80L Fridge
  • 40" Galley Cabinet
  • Beautifully Hand-Crafted Countertop
  • 104" Front Upper Cabinet with Under Cab Lighting
  • Slider-Door Storage Bench
  • Bed Assembly with Wheel Well Storage Boxes
  • Lagun Table & Mount
  • Custom Cut Memory Foam Mattress
  • Captain Swivel Seats
  • 415 Ah Lithium Smart Battery (Expandable)
  • Ship to Shore Charging
  • DC-DC Charger
  • 500W Solar
  • Switch Panel with Dimmable Light Switches
  • 8 LED Puck Lights with Two Lighting Zones
  • Dimmable Upper Cabinet LED Lights
  • 2 LED Bedside Reading Lights with USB
  • 2 Port USB Plug
  • 1-12V Socket
  • 1-110V Outlet
  • 5 Gallons Of Fresh Water
  • 5 Gallon Grey Water
  • Cassette Toilet
  • Sink
  • Ventilation Fan
  • 4-Season Wool Insulation
  • Fuel Heater
  • Screened Awning Window Driver’s Side
  • Fixed Glass Window Sliding Door
  • Awning
  • Exterior Shower
  • Byrne Fabric Walls
  • Havelock Wool Insulation
  • Coindot Flooring
  • Cedar Ceiling with Stainless Steel Screws
  • Formica Finish on Cabinets

Step Inside!

Interactive 360-degree virtual image. You can look all around the van, or switch to VR mode and it's like you're in the van!