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Rhino-Rack MasterFit Rooftop Cargo Box - 15-1/2 cu ft - Textured Black

Rhino-Rack MasterFit Rooftop Cargo Box - 15-1/2 cu ft - Textured Black

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Roof Box
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Shipping Weight: 51 lbs
Rhino Rack Aero Bars,Factory Bars,Square Bars,Round Bars,Elliptical Bars Roof Box - RRRMFT440
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Product Images

In Use/Installed

75 x 32 x 16. Roof box mounts to your crossbars with MasterFit clamps. Locking lid opens from either side of your vehicle. Great for carrying skis, snowboards, and other gear on crossovers or mid-size wagons. Durable ABS plastic construction. Lowest Prices for the best roof box from Rhino Rack. Rhino-Rack MasterFit Rooftop Cargo Box - 15-1/2 cu ft - Textured Black part number RRRMFT440 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Q & A (9)
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Rhino Rack Roof Box

  • Rhino Rack
  • Aero Bars
  • Factory Bars
  • Square Bars
  • Round Bars
  • Elliptical Bars
  • Medium Capacity
  • Medium Length
  • Black
  • Medium Profile
  • Dual Side Access

75 x 32 x 16. Roof box mounts to your crossbars with MasterFit clamps. Locking lid opens from either side of your vehicle. Great for carrying skis, snowboards, and other gear on crossovers or mid-size wagons. Durable ABS plastic construction.


  • Cargo box mounts on your vehicle's roof rack to provide enclosed storage for your gear
    • Perfect for carrying sports equipment and large luggage for up to 3 people
    • Great for crossovers or mid-size wagons
  • Dual-side-opening lid lets you load and unload gear from either side of your vehicle
  • 2 Locks ensure your cargo is secure
    • Key can only be removed when box is closed and locked
  • MasterFit clamps offer quick, simple installation
    • Slide the clamps into place over your bars
    • Tighten the knobs inside the box
    • Press down on the buttons to lock clamps in place
  • Aerodynamic shape helps reduce wind drag
  • Rear spoiler plate deflects dirt and road debris
  • 6 Internal anchor points and 2 included straps let you tie down gear inside the box
  • Durable yet lightweight ABS plastic construction resists impacts and UV rays
  • Textured black color


  • Application: round, square, aero, elliptical, and most factory crossbars
    • Crossbar spread: 24-3/8" - 36-5/8"
    • Requires adapter kit (RUBK-MF - sold separately) to fit Rhino-Rack Heavy-Duty crossbars
  • Carrying capacity: 15.5 cu ft
  • Maximum Ski/Snowboard Length: 187 cm
  • Weight capacity: 165 lbs
  • Exterior dimensions: 75" long x 32" wide x 16" tall
  • Strap dimensions: 78" long x 1" wide
  • Box weight: 56 lbs
  • 5-Year limited warranty

masterfit cargo box diagram

Cargo boxes, bags, and baskets are great for transporting gear on your vehicle's roof. A cargo box has the added benefits of an aerodynamic shape that reduces drag and wind noise, a hard shell to protect your gear, and a higher degree of weather resistance. And you can latch and lock a cargo box for added protection against theft.

Aerodynamic Cargo Box with Textured Finish

masterfit cargo box

The MasterFit has 15.5 cu ft of space for sports equipment, camping gear, or large luggage for up to 3 people. The aerodynamic, low-profile design helps reduce wind noise and drag. The locking lid opens from both sides, and it's designed to provide clearance when you open your rear hatch. Sliding clamps accommodate most crossbar styles and spreads so you can install the box in minutes without tools. And the durable yet lightweight ABS plastic construction helps to prevent warping, denting, or cracking.

Sturdy, Dual-Side-Opening Lid

masterfit cargo box opening

The MasterFit lid opens from both sides for easy access to your cargo. This ensures your gear is always close at hand whether you mount the box in the center of your roof or closer to the driver's or passenger's side.

Built-In Security

Rhino Rack Master Fit Lock

There is a lock on each side of the box. These locks prevent you from removing the keys if the box is not properly closed and locked. This eliminates the possibility of the box opening as you travel down the road. And because the buttons that lock the clamps to your crossbars are inside the box, locking the mounted box prevents would-be thieves from removing the box from your roof.

MasterFit Mounting System

Rhino Rack Clamp

The MasterFit installs with easy-to-use clamps. These clamps fit most crossbar styles, and they slide along tracks in the floor of the box to accommodate different crossbar spreads. Large, easy-to-grab knobs with built-in locking buttons make adjustment simple. Press the red button to open the clamp, slide it into place over your crossbar, then turn the knob to secure it in place. The knob clicks when it's tight so you won't overtighten and damage your crossbars. Press the red button again to secure the clamp in place.

Cargo Tie-Down Anchors

Rhino Rack Luggage Strap

It includes 2 tie-down straps to secure your gear to 6 internal anchor points. These nylon straps have cam buckles so you can tighten them down to secure your luggage. Metal rails on the bottom of the box reinforce both the internal anchor points and the mounting clamp tracks.

RMFT440 Rhino Rack MasterFit Roof Top Cargo Carrier - 15-1/2 cu ft - Textured Black

Item # RRRMFT440

Installation Details RRRMFT440 Installation instructions


Ask the Experts about this Rhino Rack Roof Box

  • Will the Rhino Rack MasterFit Rooftop Cargo Box Fit on a 2018 Ford Focus Hatchback
    The Rhino Rack MasterFit Rooftop Cargo Box # RRRMFT440 is compatible with the Rhino Rack RS2500 roof rack # RRRS323B and is designed to be mounted with at least 49-1/4" from the center of the front cross bar to the line where the rear hatch door meets the roof on the vehicle. You'll need to measure the distance on your vehicle to confirm whether or not this cargo box will allow you to fully open the rear hatch on your 2018 Ford Focus. As long as your measurement is 49-1/4" or longer, this...
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  • Do Locks On Both Sides of Rhino-Rack MasterFit Cargo Box Need to be Unlocked to Gain Access
    The Rhino-Rack MasterFit Rooftop Cargo Box # RRRMFT440 referenced in your question does feature a lock on each side of the box but you only need to unlock the core on the side you are opening. The dual side opening lid allows you to load or unload your cargo from either side of the vehicle and 2 keys are included. I have attached the written instructions manual that you can take a look at as well.
    view full answer...
  • Cargo Box to Work with Accessory Bars on Rhino-Rack 60" x 49" Pioneer Platform
    I do have a good option for you, however your existing Yakima SkyBox 16 # Y07335 won't be able to mount to the 48" Accessory Bars # RR43137B on the Rhino-Rack Pioneer Platform. This is because the mounting clamps on the Yakima Box, which are spaced apart by 21 inches (side to side), won't line up to gaps in the Pioneer Platform. This means they won't be able to access the underside of the Accessory Bars for proper attachment. The Accessory Bars are primarily designed to work with accessories...
    view full answer...
  • Crossbars and Feet for Rhino-Rack RT-Style Roof Rack Tracks on 2017 Toyota Tacoma for Cargo Box
    We have everything you need to add a roof rack to your 2017 Toyota Tacoma with the Rhino-Rack RT-Style Roof Rack Tracks # RRRTS547 on it; you'll need both the crossbars and the foot pack which hold the crossbars in place. For the foot pack that fits these tracks you will need the Rhino-Rack Quick Mount Legs for Vortex Aero Crossbars - RTC and RT Roof Rack Tracks # RRRLT600 and for the crossbars for your truck you'll need the Rhino-Rack Vortex Aero Crossbars # RRVA137B-2 (Black) or #...
    view full answer...
  • Roof Rack for 2017 Ford Edge With Panoramic Vista Sunroof and No Raised Rails
    I have a solution for your 2017 Ford Edge with the panoramic sunroof, but the Thule # THKIT4047 , # TH7602B and # TH7603B are not going to be a fit since you would need the side rails already on your vehicle to make that work. To my knowledge, these are only installed at the factory and not available as something that can be added on at the dealer (or anyone else) after the fact. Instead, I recommend the Rhino Rack RS2500 # RRRS659B which has the same ability to work with the panoramic...
    view full answer...
  • Best Roof Rack for a 2013 Nissan Frontier with Factory Side Rails
    Good question. We have exactly what you're going to need to get your roof rack installed on your 2013 Nissan Frontier. It is a quick and easy installation that you'll have done in under a half an hour. You'll just need two part numbers to make this happen. I'll also provide a few of my favorite roof mounted accessories if you haven't already got what you need. By using Rhino-Rack Vortex Aero Crossbars - Aluminum - Silver - 46" Long part # RRVA118S-2 and Rhino-Rack SX Series Legs for...
    view full answer...
  • How to Carry Skis and Snowboards on a 2011 Honda CR-V
    We have some excellent options for your 2011 Honda CR-V that will allow you to carry both skis and snowboards. The majority of these options are first going to require that you have a roof rack installed. For a roof rack, I recommend like the Rhino-Rack RVP Roof Rack part # RRRVP15 because it has a sleek look and installs using fixed mounting points so you don't have to worry about door clips. It also has aero shaped cross bars which are less noisy. Then in order to attach your skis...
    view full answer...
  • Middle-of-the-Road Roof Rack Recommendation for Roof Box on a 2012 Honda CR-V EX-L
    You are correct that there is a break-point in roof rack quality. A middle-of-the-road option that I recommend using for your 2012 Honda CR-V EX-L is the Rhino-Rack Vortex Aero Crossbar system which includes the following for your flush mount rails: 49" Vortex Crossbars - Black # RRVA126B-2 or Silver # RRVA126S-2 RCL Legs - # RRRCL4 RCP Fit Kit - # RRRCP33-BK The biggest differences between the Rhino-Rack setup vs a Thule setup for example is that the Thule pieces tend to fit together...
    view full answer...
  • Crossbar Spacing of Rhino-Rack Roof Rack on 2014 Ford Flex With Naked Roof for Rooftop Cargo Box
    The crossbar spacing of the Rhino-Rack roof rack on your 2014 Ford Flex with a naked roof - Rhino-Rack Vortex Aero Crossbars # RRVA150B-2, Rhino-Rack 2500 Series Legs # RRRLKVA, and Custom DK Fit Kit # DK188 - does need to be spaced at 31-1/2 inches apart, as per the manufacturer's instructions. This is the spacing Rhino-Rack determined was appropriate for your Flex in order to maintain the capacity and stability of the rack, so you will need to remain at this spacing. What you will...
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Info for this part was:

Video by:
Andrew K
Test Fit:
Colin H
Video Edited:
Dustin K
Edited by:
Daron K
Written by:
Alex H

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