Roof Cargo Box Recommendation to Fit Thule TracRac SR Ladder Rack

Question:

Do you know of any cargo boxes that are compatible with the Thule Tracrac SR? The Tracrac crossbars are wider than usual, I think they are 4. And I would want a cargo box where the mount points are 55 inch center to center. Thanks

asked by: Ron

Expert Reply:

You are correct that the TracRac SR crossbars are wider than standard roof rack crossbars as they measure 4" wide. For your application I recommend the Thule Motion XT Rooftop Cargo Box - 22 cu ft # TH629906 which comes with mounting hardware that clamps onto standard crossbars, but you can upgrade the mounting hardware using the T-Track Adapter # TH27PQ. This allows you to mount the cargo box via the T-Slots in your TracRac SR crossbars instead of clamping around them.

The only issue with this is that the max crossbar spread for the Motion XT is 36-7/8" which is significantly less than the 55".

If you don't already have a ladder rack then another possibility is the Yakima OverHaul HD # Y01151-58 which has a lower weight capacity at 500 lbs and it doesn't have the ability to slide along the length of the bed, but it does use crossbars that have more of a standard size so you can use the Yakima SkyBox 21 # Y07337 which uses clamps and has a max crossbar spread of 42".

expert reply by: Jon G