Apex Expandable Roof Cargo Bag – 13.5 Cubic ft & 18 Cubic ft

You'll have room to relax on your next road trip when you stow your extra luggage or gear in a roomy, expandable roof bag. Made of waterproof, PVC-coated nylon, this roof bag straps right onto your vehicle's crossbars and side rails with 4 included tie down straps and expands in height from 14" to 18". Choose from sizes regular or large.

  • Straps to a roof rack for extra cargo space
  • Height expands from 14" to 18"
  • Waterproof, PVC-coated nylon construction
  • Weather-sealed zipper and storm flap
  • Includes storage bag
  • Available in two sizes: 38"L x 34"W x 18"H or 48"L x 36"W x 18"H
1 Year Warranty
Item # Description Length Width Capacity Status Price Quantity
RBG-07-2 Regular Expandable Waterproof Roof Cargo Bag 38" 34" 10-1/2 - 13-1/2 Cubic Ft.
RBG-07-4 Large Expandable Waterproof Roof Cargo Bag 48" 36" 14 - 18 Cubic Ft.


Easily adjusts in height from 14" to 18" to haul between 10-1/2 and 18 cubic ft. of extra cargo on a vehicle roof. Includes all necessary tie-down straps for attachment.


New waterproof RBG-07 series roof bags expand in height (14" to 18") on a vehicle roof for carrying extra gear and cargo, saving valuable space inside. The RBG-07-2 roof bag features a 10-1/2 to 13-1/2 cubic ft. capacity while the larger version, RBG-07-4 roof bag, is capable of holding between 14 and 18 cubic ft. of extra cargo. Both sizes include (4) pre-assembled tie-down straps for attachment to an existing vehicle roof rack and cross-bar system. Features a self-repairing weather sealed zipper, a flip-over storm flap to protect the zipper. Made with durable PVC coated nylon to protect valuables inside. Includes a one year manufacturer's warranty.


Product Features

  • Works with existing vehicle roof cross-bars and side rails
  • Expandable height adjustment from 14" to 18"
  • (4) Pre-assembled tie-down straps
  • Weather-sealed zipper and storm flap
  • Waterproof PVC coated nylon storage area
  • Includes a storage bag with cinch drawstring
  • Available in (2) sizes, up to 13-1/2 or 18 cubic ft. capacity
  • 1 year manufacturer's warranty


Instruction Manual

Review Summary (Based on 3 Reviews)


5 Stars Performed Great

Mark from NC wrote (December 28, 2017):

Did a ton of research on affordable softside roof cargo bags. Used it for 600 mile drive and return this week. Highway driving at up to 75 mph. It did great. I have the smaller bag. It fix a huge duffle type suitcase, a second suitcase and small duffle. Fits perfect on our '17 Subaru Outback. Wish the straps were a little longer but they worked fine. I reinforced with two bungie cords, bu t not sure they were needed. Didn't encounter any rain so cant speak tobei g waterproof but liked that flap over the zipper was a good 3-4". Recommend buying a no slip mat to put under it. Definitely recommend and price is definitely right.

5 Stars Expandable cargo roof bag

Gary from MI wrote (December 05, 2016):

Excellent product and company to deal with. This is our second roof bag like this one. Keeps things dry and so nice to have the extra space when needed. This one is for my son and his growing family.

5 Stars Car Top Storage

Lance Morley from CA wrote (June 21, 2015):

Well made and waterproof. Comes in it's own storage bag. Convenient straps to attach to the car top rails. I like the feature of being expandable up to 18 cubic feet. Perfect for small loads or large. Easy to attach and easy to store after use.