Product details


Elevate your van conversion project to new heights with our Promaster Van Wheel Well Cabinets and create a usable and functional space in the garage of your campervan. Crafted with precision and tailored for the van life and van conversion community, these wheel well cabinets are your key to a more organized and efficient mobile lifestyle.

When optimizing your Promaster Van for the ultimate van life or conversion experience, our custom-designed Promaster Van Wheel Well Cabinets fit the bill perfectly. Our cabinets stand out as the top choice for those seeking a seamless blend of convenience and versatility. With lightweight construction and easy installation, they offer a hassle-free setup, ensuring you can hit the road sooner. The double mirrored design with rear access doors adds an element of accessibility that is unparalleled, making it easier to reach your essentials from inside or outside your van. Plus, the wheel well cabinets are thoughtfully designed to accommodate a variety of water tank and electrical systems, and their compatibility with the Northwest Conversions 20-gallon tank is a game-changer. 

Our Promaster wheel well cabinets offer a level of convenience and organization that's hard to beat, with soft-close hinges, adjustable latches, and gas-piston lift assist for smooth operation. Choosing Serg Supply means choosing a more functional and efficient van life. Don't settle for less; invest in our Promaster Van Wheel Well Cabinets to transform your van into a fully optimized, on-the-go haven.


  • Lightweight and Effortless Installation: Our Promaster Van Wheel Well Cabinets are designed with ease of use in mind. Their lightweight construction ensures a hassle-free installation, allowing you to focus on the adventure ahead.
  • Double Mirrored Design with Rear Access: These cabinets feature a unique double mirrored configuration with tall access doors at the back of your van, providing convenient accessibility from both inside the vehicle and through the rear doors.
  • Versatile for Water and Electrical Systems: No need to compromise on functionality. These cabinets are built to accommodate a wide range of water tank and electrical systems, complete with a water level sight notch on the tank side. They are a perfect fit for the Northwest Conversions 20-gallon tank, enhancing your van's utility.
  • Flexible Mounting Options: Whether you prefer an externally mounted water tank or an internal setup, our cabinets are designed to slip seamlessly over pre-mounted water tanks, offering versatility in your van conversion layout.
  • Smooth and Secure Closure: The Promaster Van Wheel Well Cabinets are equipped with soft-close hinges and adjustable latches, ensuring a secure and rattle-free ride. Say goodbye to unexpected disturbances on the road.
  • Convenient Upper Door Lift Assist: Gain quick and easy access to your essentials stored in the upper cabinets thanks to the gas-piston lift assist mechanism. No more struggling with hard-to-reach items, making your van life experience even more comfortable.


  • Prefinished Maple
  • Unfinished Maple
  • Prefinished Amber Bamboo
  • Black Hex-Ply Birch

Please refer to our materials page here to see images and details of each option: Materials


Outside Dimensions: 54"-72" Width x 33" Height x 18" Depth


The different widths are specifically optimized for different vehicles.

54": Fits Sprinter 144", Promaster 136", and Transit 148"
60": Fits Sprinter 144", Fits Sprinter 170", Promaster 159", Transit 148".
66": Fits Sprinter 170"/170"EXT, Promaster 159"/159"EXT,  Transit 148"/148"EL
Fits Sprinter 170"/170"EXT, Promaster, 159"EXT,  Transit 148"EL

DIY Installation

Installation Difficulty: Easy | 2 people
Installation Time: 1 Hour
Tools Needed: Power Drill, Rivet Nut Tool, Screw Driver, Drill Bits


  • How do wheel well boxes mount?

The wheel well boxes are designed to shoot into the wall and the subfloor. We recommend using rivet nuts inserts for the wall, but self-tapping screws will work for most builds.  

  • What goes inside the wheel well boxes?

The wheel well boxes are designed to house all water tanks, plumbing, and electrical. Easy access hinged doors allow you to get in and out for smooth installation and maintenance. Electrical equipment may be mounted inside the wheel well box or the wheel well panels behind the box. We recommend cutting ventilation for electrical equipment, heaters, or pumps.

  • How do I apply paint, stain, or sealer?


  • Lightly scuff the entire cabinet surface that you plan on coating with 120-180 grit sandpaper.
  • Apply 2-3 coats of primer before applying your main coat.
  • Always apply a finish when you're happy with the paint for a long-lasting appearance.


  • Sand the surface on all faces with sandpaper traveling with the grain of the wood.
  • Apply stain cautiously to a section of the cabinet that will not be visible to gauge the volume and pressure you need to achieve the look you want.
  • Apply the stain evenly with a rag, sponge, or spray gun until all surfaces are coated.
  • Please note that overlapping surfaces may make the stain darker on the overlapped areas.
  • Always apply a finish when you're happy with the stain for a long-lasting appearance.