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Thule Force XT Sport roof cargo box installed.

Attached are some photos of the 11 cu ft Thule Force XT Sport cargo roof box on OEM roof racks. The front overhang is what I was worried about, but I found this
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acceptable.
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One of my requirements was to get a cargo box that I can drive in and out of a normal residential garage door without having to remove it. This cargo box with a height of 16.75 inches plus the height of OEM roof racks on which it is mounted met that criterion. It weighs 32 lbs which is actually pretty good. There are not too many to choose from when one is searching for a cargo box around 70 inches long to keep the front overhang to an acceptable level.
 
I’m currently researching cargo boxes and also want to be able to pull into our garage with it attached. We have a MYP, so I think that buys us another inch in height, but the height from floor to the lowest part of our garage door is 83 inches. That gets us about 19 inches of play, minus whatever the factory roof racks add.

What is the total height of your setup? In your garage clearance pic, how high is that opening for your garage door? Thanks!
 
I’m currently researching cargo boxes and also want to be able to pull into our garage with it attached. We have a MYP, so I think that buys us another inch in height, but the height from floor to the lowest part of our garage door is 83 inches. That gets us about 19 inches of play, minus whatever the factory roof racks add.

What is the total height of your setup? In your garage clearance pic, how high is that opening for your garage door? Thanks!
I'm on a road trip, now in South Florida with my Tesla and the roof box, so I have to get back home to measure my garage door height from the ground. Originally, I had parked the car half pulled in to the garage with the highest point of the roof rack (at its midpoint) directly beneath the garage door and measured about 19 inches gap before rushing over to my REI to do further math. My MYLR is on 19 inch aero wheels. I had installed brand new Bridgestone Turanza Quiettracks the day before which are 800 treadwear rated and has thick rubber compared with OEM Contis. I don't know how much of a factor this would be. The OEM roof rack is 3 inches tall from the glass roof at its midpoint and about 2.8 inches towards the door frame. Interestingly, the Thule Force XT Sport roof rack per my measurements is approx 14.5 inches at its tallest section. I wonder whether the height measurement of 16.75 inches on the factory sticker is including the locking jaws installed. I believe that's the case from the clearance I have from my garage door which is a good two inches. Hope this helps.
 
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The real question is what is this doing to your energy efficiency at highway speeds? I found that even mountain bikes on a hitchrack really changed efficiency to where we had to be much more strategic with charging on the road. Eventually dialed in the right efficiency in ABRP to account for it.
 
I am half way thru my road trip of about 4000 miles since Christmas day on brand new Bridgestone Turanza Quiettracks which are about five pounds heavier per tire than stock Continentals and the cargo box mounted on top. I shall post the energy consumption figures in detail comparing it to the exact same trip I did in March- April of 2021, starting the evening I took delivery of my car. The two variables are brand-new Continentals vs Bridgestones and roof rack vs roof rack plus cargo box. Weather patterns seem to be very comparable.
 
Not too bad Wh/mi with the box on!

I was able to figure out the height of my roof rack on our MYP using a 2x4, a level and a tape measurer. It's just about 64.75" from the floor to the top of the front roof rack (the higher of the two). I do have 19" winter tires on (255/45r19), but the diameter should be pretty close to the stock Uberturbines so I don't know if I have to factor that in. I re-measured my garage opening and the lowest spot is 82", so I'll need to go with a slimmer box like the Yakima CBX or something like that.
 
Attached are some photos of the 11 cu ft Thule Force XT Sport cargo roof box on OEM roof racks. The front overhang is what I was worried about, but I found this View attachment 746141 View attachment 746142 acceptable. View attachment 746144 View attachment 746145
I bought the exact same box for my Tesla S 2021 - the roof rack were installed by Tesla, but I wasn’t able to install the box as it seems like the racks are about one inch too far apart and do not fit within the box’s groove… did you get that problem? Tesla says I cannot move the racks as they can only fit in their specific spot because if the glass roof… i thought I bought the wrong box but see you installed it… thoughts??
 
I bought the exact same box for my Tesla S 2021 - the roof rack were installed by Tesla, but I wasn’t able to install the box as it seems like the racks are about one inch too far apart and do not fit within the box’s groove… did you get that problem? Tesla says I cannot move the racks as they can only fit in their specific spot because if the glass roof… i thought I bought the wrong box but see you installed it… thoughts??
Sorry to hear about the issue. I have a 2021 Model Y. I did not have the issue of the OEM racks being spaced too far apart for the 11 cu ft Thule Force XT. I took some measurements for comparison purposes. The distance between the inner edges of the OEM roof racks is 30 inches (back edge of the front cross bar to the front edge of the rear cross bar). The distance between the outer edges ( the front edge of the front cross bar to the back edge of the rear cross bar) is 36.5 inches in my case. I measured these close to the midline of the car, not exactly at the midline. I am wondering whether the Model S cross bars are further apart than a Model Y. I can't possibly think of any other reason.
 
Sorry to hear about the issue. I have a 2021 Model Y. I did not have the issue of the OEM racks being spaced too far apart for the 11 cu ft Thule Force XT. I took some measurements for comparison purposes. The distance between the inner edges of the OEM roof racks is 30 inches (back edge of the front cross bar to the front edge of the rear cross bar). The distance between the outer edges ( the front edge of the front cross bar to the back edge of the rear cross bar) is 36.5 inches in my case. I measured these close to the midline of the car, not exactly at the midline. I am wondering whether the Model S cross bars are further apart than a Model Y. I can't possibly think of any other reason.
Anser, Can you help me solve a mystery? My Model Y (made May '21) has Tesla OEM crossbars that measure 39 inches front edge (front) to back edge (rear). I'm wondering how yours are closer together. According to the instructions, the center of each mount point should be is 227 mm (9") from front edge of glass and 412 mm (16.2") from rear edge. Those match my installation. Can you measure yours and determine what's different about your installation? Did you mount where the glass showed the mount points (hard to see). Wondering if Tesla changed something with the roof during the year. Having a hard time finding a Thule box that has claws that support outer edge of bars (39").
 
Anser, Can you help me solve a mystery? My Model Y (made May '21) has Tesla OEM crossbars that measure 39 inches front edge (front) to back edge (rear). I'm wondering how yours are closer together. According to the instructions, the center of each mount point should be is 227 mm (9") from front edge of glass and 412 mm (16.2") from rear edge. Those match my installation. Can you measure yours and determine what's different about your installation? Did you mount where the glass showed the mount points (hard to see). Wondering if Tesla changed something with the roof during the year. Having a hard time finding a Thule box that has claws that support outer edge of bars (39").
MDelectric, I am on vacation and unfortunately my car is back home. The crossbars were installed by tesla service at the time of delivery, so I assumed they did a good job. Strangely, recently I noticed that they were not aligned parallel to each other and there was forward and backward sliding possible to the tune of nearly an inch at all four attachment points. I'm planning to bring it in to Tesla service and check it out. With this wiggle room of nearly an inch with each bar, I won't be surprised if they tighten them down and I end up with different parameters of the distances between the crossbars. If that's the case I may end up with numbers closer to yours and having to struggle with my Thule roof box. Hoping that doesn't happen. But I was definitely surprised to see that almost an inch of fore and aft movement at each "leg".
 

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