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  1. #1
    Join Date
    Dec 2016
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    In a van... down by the river
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    12,909

    Roof box question

    Does anyone know of any roof boxes that will work on bars that are 42.5" apart? My Mazda's factory tower locations are apparently quite far apart - my existing Yakima box won't adjust far enough to clamp on the crossbars.

  2. #2
    Join Date
    Jul 2016
    Location
    NY
    Posts
    3,152
    Any reason you canít drill new holes in it?

  3. #3
    Join Date
    Sep 2004
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    LV-426
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    20,849
    I think you'll have to drill to make the box fit.
    Quote Originally Posted by powder11 View Post
    if you have to resort to taking advice from the nitwits on this forum, then you're doomed.

  4. #4
    Join Date
    Mar 2006
    Location
    General Sherman's Favorite City
    Posts
    34,191
    I smell an opportunity to expand your rooftop box quiver.
    I still call it The Jake.

  5. #5
    Join Date
    Mar 2005
    Location
    Colorado
    Posts
    2,707
    Consider before drilling if it will allow the box to work with the hatch, or will in interfere, and also that the box isn't too far forward over your windshield.

    Is it a newer Mazda? The Thule Force roof box seems to play along nicely with many, depending on which size.

    Stupid question but, the factory bars aren't adjustable? What's your make/year? Use an online fit configurator if you are looking at a new box, though Thule messed their's up the past few years so it doesn't work as well as it used to. Rackstarz in Boulder absolutely knows their shit and maybe can help you with a solution as well.

  6. #6
    Join Date
    Dec 2016
    Location
    In a van... down by the river
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    12,909
    Quote Originally Posted by Jax View Post
    Consider before drilling if it will allow the box to work with the hatch, or will in interfere, and also that the box isn't too far forward over your windshield.

    Is it a newer Mazda? The Thule Force roof box seems to play along nicely with many, depending on which size.

    Stupid question but, the factory bars aren't adjustable? What's your make/year? Use an online fit configurator if you are looking at a new box, though Thule messed their's up the past few years so it doesn't work as well as it used to. Rackstarz in Boulder absolutely knows their shit and maybe can help you with a solution as well.
    This car (2016 CX-5) didn't have factory bars - it had nothing. Fortunately, it *did* have threaded mount points under a metal trim piece. But these are fixed mount points.

    Thanks for the Rackstarz suggestion - I'll contact them and see if they have anything that'll fit.

  7. #7
    Join Date
    Dec 2016
    Location
    In a van... down by the river
    Posts
    12,909
    Quote Originally Posted by BmillsSkier View Post
    I smell an opportunity to expand your rooftop box quiver.
    I mean - that's what I'm looking to do. I'm not going to try to make the Yakima fit - it's got a weird sliding adjuster thing that I'm definitely not fucking with. It just won't adjust "long" enough...

  8. #8
    Join Date
    Mar 2006
    Location
    General Sherman's Favorite City
    Posts
    34,191
    Thule's spec sheet doesn't show any boxes with max bar spread over 40" (assuming this is the latest and greatest)

    https://www.thule.com/-/s/approved/s...75.pdf?rev=3.6
    I still call it The Jake.

  9. #9
    Join Date
    Mar 2012
    Location
    The Bull City
    Posts
    13,962
    I drilled new holes in one side of my Thule and added washers under the nuts to spread out the load.. 15 years ago and still holding up just fine..
    Go that way really REALLY fast. If something gets in your way, TURN!

  10. #10
    Join Date
    Oct 2011
    Location
    Aspen
    Posts
    2,834
    Quote Originally Posted by SumJongGuy View Post
    I drilled new holes in one side of my Thule and added washers under the nuts to spread out the load.. 15 years ago and still holding up just fine..
    Yeah I've got 3-4 sets of holes in an old, giant Thule. Works great and has fit a bunch of different cars

  11. #11
    Join Date
    Feb 2012
    Posts
    10,621

    Roof box question

    Anyone with an over 200cm roof box and a 4Runner runs into similar issues, the factory rails are too far back and block the tailgate.

    I bought a pair of cross rails online that clamp into the door frame, just installed one of them and shifted the box forward using one factory rail in the back and the after market rail up front.

    So you could just add an after market cross rail at the 40 inch mark, easy and cheap on Amazon.

    Saves drilling into the box and can remove after ski season back to normal.

    https://www.amazon.com/Universal-Ant...0-4513d670b6bc

  12. #12
    Join Date
    Dec 2010
    Posts
    3,639
    Quote Originally Posted by AK47bp View Post
    Anyone with an over 200cm roof box and a 4Runner runs into similar issues, the factory rails are too far back and block the tailgate.

    I bought a pair of cross rails online that clamp into the door frame, just installed one of them and shifted the box forward using one factory rail in the back and the after market rail up front.

    So you could just add an after market cross rail at the 40 inch mark, easy and cheap on Amazon.

    Saves drilling into the box and can remove after ski season back to normal.

    https://www.amazon.com/Universal-Ant...0-4513d670b6bc
    I just slammed the box as far forward as possible, unevenly tightend the mounting clamps to keep the box as far forward as possible, and bobsyeruncle. The tailgate raises within an inch of its max height, so im calling it a success.

  13. #13
    Join Date
    Feb 2012
    Posts
    10,621
    Quote Originally Posted by californiagrown View Post
    I just slammed the box as far forward as possible, unevenly tightend the mounting clamps to keep the box as far forward as possible, and bobsyeruncle. The tailgate raises within an inch of its max height, so im calling it a success.
    I tried that and my tailgate pistons failed halfway through the season because they couldnít fully extend.

  14. #14
    Join Date
    Dec 2010
    Posts
    3,639
    Quote Originally Posted by AK47bp View Post
    I tried that and my tailgate pistons failed halfway through the season because they couldn’t fully extend.
    Remove the spoiler/wing? I read somewhere that it does actually help with MPG, but idk how that can be true. Seems odd to be the only SUV on the road with a spoiler on the back for... downforce?

  15. #15
    Join Date
    May 2009
    Location
    inpdx
    Posts
    19,777
    i mean...cmon
    Name:  Sideways-roofbox.jpg
Views: 164
Size:  26.9 KB

  16. #16
    Join Date
    Feb 2012
    Posts
    10,621
    Quote Originally Posted by californiagrown View Post
    Remove the spoiler/wing? I read somewhere that it does actually help with MPG, but idk how that can be true. Seems odd to be the only SUV on the road with a spoiler on the back for... downforce?
    I wouldnít want to do that with a 5th gen.

  17. #17
    Join Date
    Jun 2020
    Posts
    4,913
    Quote Originally Posted by californiagrown View Post
    Remove the spoiler/wing? I read somewhere that it does actually help with MPG, but idk how that can be true. Seems odd to be the only SUV on the road with a spoiler on the back for... downforce?
    I wasnít an aerodynamicist, but I do know that spoilers like that do reduce drag. Canít tell you if itís because of cleaner flow separation, or keeping flow attached for longer, or some other mechanism.

  18. #18
    Join Date
    Feb 2007
    Location
    righthere/rightnow
    Posts
    3,039
    Roof boxes suck for gas mileage.
    Dead hookers should go in the trunk anyway, you could hurt your back getting them in a roof box.

  19. #19
    Join Date
    Jan 2006
    Location
    Portland, OR
    Posts
    423
    Many of the spoilers are at least partly designed to ensure air flow goes down over the back window, rather than up from the rear tires. Seems real minor but can make a huge difference in seeing out the back window, and can have safety features if the rear window opens and could potentially bring exhaust into a car moving down the highway.

  20. #20
    Join Date
    May 2009
    Location
    inpdx
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    19,777
    Quote Originally Posted by alembical View Post
    Many of the spoilers are at least partly designed to ensure air flow goes down over the back window, rather than up from the rear tires. Seems real minor but can make a huge difference in seeing out the back window, and can have safety features if the rear window opens and could potentially bring exhaust into a car moving down the highway.
    i always wondered why a wagon needed a spoiler at the rack


  21. #21
    Join Date
    Aug 2016
    Location
    关你屁事
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    9,374
    Quote Originally Posted by californiagrown View Post
    I just slammed the box as far forward as possible, unevenly tightend the mounting clamps to keep the box as far forward as possible, and bobsyeruncle. The tailgate raises within an inch of its max height, so im calling it a success.
    And you tied it on with bootstraps, right?

  22. #22
    Join Date
    Mar 2012
    Location
    The Bull City
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    13,962
    Quote Originally Posted by AK47bp View Post
    I tried that and my tailgate pistons failed halfway through the season because they couldn’t fully extend.
    My 09 Forester hatch has been hitting the box for a good 14 years with no stay piston issues. I think you truck just doesn't like you..
    Go that way really REALLY fast. If something gets in your way, TURN!

  23. #23
    Join Date
    Sep 2006
    Posts
    6,330
    Good to know on the spoiler.

  24. #24
    Join Date
    Feb 2012
    Posts
    10,621

    Roof box question

    Quote Originally Posted by SumJongGuy View Post
    My 09 Forester hatch has been hitting the box for a good 14 years with no stay piston issues. I think you truck just doesn't like you..
    4Runner tailgates are heavy as fuck due to the giant window that opens and closes.


    Happy for you though.

  25. #25
    Join Date
    Dec 2003
    Location
    Seattle
    Posts
    33,422
    Quote Originally Posted by J. Barron DeJong View Post
    I wasnít an aerodynamicist, but I do know that spoilers like that do reduce drag. Canít tell you if itís because of cleaner flow separation, or keeping flow attached for longer, or some other mechanism.
    Having accidentally torn off one of those roof spoilers... you're going to get a trunk and tailgate full of water if you remove it.
    Quote Originally Posted by Downbound Train View Post
    And there will come a day when our ancestors look back...........

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