Sponsored

MacO512

Well-Known Member
Joined
Dec 31, 2021
Threads
3
Messages
208
Reaction score
139
Location
Austin
Vehicles
2024 Rivian R1S - 2023 Tesla Model Y
Have been driving around with the Thule Motion XXL rooftop box for about 300 miles or so and average efficiency has been 2.2mi/kWh. Before that, the efficiency on 540 miles driven was 2.36mi/kWh. So about a 6.7% efficiency loss due to the rooftop box thus far. Almost seems too good to be true, but I sense the number will go down when we really get road tripping and spend hundreds of miles on the interstate...
Yeah that's super efficient. I hardly have any miles on mine with the Rivian but I've driven it a lot with model Y. Efficient was much worse than 7% for me. But also I noticed a huge difference at speeds. Around town or 45mpg there was almost no difference. But above 80mph it was like 25% difference or such.
Sponsored

 

mmR1S

Member
First Name
Matt
Joined
Jun 25, 2025
Threads
0
Messages
6
Reaction score
1
Location
Illinois
Website
www.emsc.com
Vehicles
2025 R1S Tri-Motor
Occupation
Digital Marketer
This past weekend, we packed the twins, their teen friend, two adults, a dog, and gear and provisions enough for two days of camping into our Gen 1 R1S. We drove 240 miles round trip to Sparrow Bend River Retreat west of San Antonio, TX. (Great spot. Highly recommended.) We hauled gear in our new Thule Motion 3 Roof Box XXL mounted atop our Gen 1 R1S. Here are some quick impressions for those looking for a larger storage solution.

IMG_3839.jpeg


As our two kids grow, we need more tents, larger tents, bigger sleeping bags, more food, more water, and more space to adventure. When they invite their friends, we need even more. To pack it all, we needed a voluminous roof-mounted storage solution that was aerodynamic and could mount on the crossbars. The Motion 3 XXL fit the bill.

I mounted the Motion 3 XXL on the rear two crossbars of our R1S. Mounting it on the front two placed the roof box (most roof boxes, for that matter) far forward, creating a long overhang that's difficult to get gear in and out of and creates significant aero drag. Since I run three crossbars at a time, I worried the box wouldn't clear both the rear hatch and the front crossbar. It did.

IMG_3833.jpeg


IMG_3834.jpeg


The Motion 3 XXL swallowed:
  • 5 collapsable chairs
  • 1 foldable camp kitchen
  • 1 camp shower
  • 2 tents, one large, one small
  • 2 collapsable wash buckets
  • 5 sleeping bags
  • 4 sleeping pads (one was a double)
  • 1 camera tripod
That's a lot of gear. Without that extra storage, we'd have needed to bring two cars. We kept the third row down to hold two coolers and several boxes of camping gear and food. We filled the frunk to capacity with water bottles and clothes.

IMG_3836.jpeg


Aero drag was about what I'd expect from a roof box. I recently changed my tires (to Toyo Open Country A/T III EVs) so I couldn't do a controlled drag comparison, but I estimate I lost 14-16% efficiency on mostly highway driving (60-80 mph) due to drag. I found the loss entirely worth the additional storage the box provided.

The big surprise was how quiet the box was at high speed. It wasn't silent but I never noticed it. It didn't whistle, rattle, or flap. Others report that the front of the XXL can bounce around and make noise but I didn't experience that over 240 miles.

All in all, the box is well-designed, the hardware is well-made, and it does everything I need it to do. And it looks pretty good too.

Recommended.


IMG_3835.jpeg


IMG_3838.jpeg
Thanks for sharing the photos and your review. Is there any room on the crossbars for Thule bike racks while the Motion 3 XXL is mounted?
 

MountainBikeDude

Well-Known Member
First Name
Adam
Joined
Jun 20, 2019
Threads
56
Messages
3,387
Reaction score
7,241
Location
Vancouver
Vehicles
2023 El Cap Quad Motor R1T (Selling the Xterra)
Clubs
 
This past weekend, we packed the twins, their teen friend, two adults, a dog, and gear and provisions enough for two days of camping into our Gen 1 R1S. We drove 240 miles round trip to Sparrow Bend River Retreat west of San Antonio, TX. (Great spot. Highly recommended.) We hauled gear in our new Thule Motion 3 Roof Box XXL mounted atop our Gen 1 R1S. Here are some quick impressions for those looking for a larger storage solution.

IMG_3839.jpeg


As our two kids grow, we need more tents, larger tents, bigger sleeping bags, more food, more water, and more space to adventure. When they invite their friends, we need even more. To pack it all, we needed a voluminous roof-mounted storage solution that was aerodynamic and could mount on the crossbars. The Motion 3 XXL fit the bill.

I mounted the Motion 3 XXL on the rear two crossbars of our R1S. Mounting it on the front two placed the roof box (most roof boxes, for that matter) far forward, creating a long overhang that's difficult to get gear in and out of and creates significant aero drag. Since I run three crossbars at a time, I worried the box wouldn't clear both the rear hatch and the front crossbar. It did.

IMG_3833.jpeg


IMG_3834.jpeg


The Motion 3 XXL swallowed:
  • 5 collapsable chairs
  • 1 foldable camp kitchen
  • 1 camp shower
  • 2 tents, one large, one small
  • 2 collapsable wash buckets
  • 5 sleeping bags
  • 4 sleeping pads (one was a double)
  • 1 camera tripod
That's a lot of gear. Without that extra storage, we'd have needed to bring two cars. We kept the third row down to hold two coolers and several boxes of camping gear and food. We filled the frunk to capacity with water bottles and clothes.

IMG_3836.jpeg


Aero drag was about what I'd expect from a roof box. I recently changed my tires (to Toyo Open Country A/T III EVs) so I couldn't do a controlled drag comparison, but I estimate I lost 14-16% efficiency on mostly highway driving (60-80 mph) due to drag. I found the loss entirely worth the additional storage the box provided.

The big surprise was how quiet the box was at high speed. It wasn't silent but I never noticed it. It didn't whistle, rattle, or flap. Others report that the front of the XXL can bounce around and make noise but I didn't experience that over 240 miles.

All in all, the box is well-designed, the hardware is well-made, and it does everything I need it to do. And it looks pretty good too.

Recommended.


IMG_3835.jpeg


IMG_3838.jpeg
Pretty cool setup, and it's things like this, that make me want the R1S over the T... Sometimes.

I also hate these photos because your damn driveway looks so nice, and reminds me of how shite mine is.
 
OP
OP
superfluid

superfluid

Well-Known Member
Joined
Mar 29, 2021
Threads
20
Messages
291
Reaction score
933
Location
Austin, TX
Vehicles
Rivian R1S, Kia Telluride
Occupation
Tech and data
Clubs
 
Thanks for sharing the photos and your review. Is there any room on the crossbars for Thule bike racks while the Motion 3 XXL is mounted?
Don't have Thule bike racks but there is some room left. Maybe for one bike.
 

Tony de Veyra

Well-Known Member
First Name
Tony
Joined
May 29, 2025
Threads
17
Messages
60
Reaction score
81
Location
Crossing the US
Vehicles
R1S, Model Y
Clubs
 
I am now 25 days into my cross-country road trip with the Thule Motion XXL box on top. My trip calculator says 3638 miles, average of 2.17 miles/kWh, 1680kWh consumed.
That said, I do not think that these numbers are representative of actual driving efficiency, as it may also be tracking power consumption while parked and car camping. I have had plenty of stretches where I have been able to get over 2.5mi/kWh.

Right now, I am just getting through a very windy stretch of CO and KS, with powerful crosswinds and still getting 2.22 mi/kWh on a 250 mile trip.

That said, I am starting to get annoyed and a little worried about how much the Thule XXL box can flex and creak. The front end of the box basically keeps dipping down and wobbling. It was shaking nonstop during our five hours on the road today, traveling 65-75mph through the hard headwinds. I am curious if anyone else has had that experience and if they have come up with any fixes.
 

Sponsored

gyphon

Member
Joined
Dec 31, 2022
Threads
2
Messages
16
Reaction score
15
Location
Bay Area, CA
Vehicles
2025 R1S Tri Max / 2023 BMW iX M60
Has anyone with a Thule Motion 3 XXL placed the box on the front two crossbars, positioned rearward as much as possible? If so, could you please post a picture and maybe provide your observations? I'm considering this configuration to allow the mounting of a Starlink Mini on the rear crossbar.
 

Simans82

Member
Joined
Feb 17, 2025
Threads
0
Messages
13
Reaction score
11
Location
Charlotte, NC
Vehicles
R1S Dual Large Performance
Has anyone with a Thule Motion 3 XXL placed the box on the front two crossbars, positioned rearward as much as possible? If so, could you please post a picture and maybe provide your observations? I'm considering this configuration to allow the mounting of a Starlink Mini on the rear crossbar.
I purchased the Thule Motion 3 XXL during the recent Memorial Day sale and just test fit it this weekend. There’s a decent amount of adjustment from front to back, but I didn’t try the configuration you mentioned yet. I‘m traveling for work all week, but I’ll try this next weekend and post a pic for reference.

Mounted to the rear, there’s plenty of clearance for the liftgate. Looking forward to having the extra storage space for our roadtrips this summer. 👍

Rivian R1T R1S Thule Motion 3 Roof Box XXL on R1S - More space, fits well, runs quiet IMG_0855
 

gyphon

Member
Joined
Dec 31, 2022
Threads
2
Messages
16
Reaction score
15
Location
Bay Area, CA
Vehicles
2025 R1S Tri Max / 2023 BMW iX M60
I purchased the Thule Motion 3 XXL during the recent Memorial Day sale and just test fit it this weekend. There’s a decent amount of adjustment from front to back, but I didn’t try the configuration you mentioned yet. I‘m traveling for work all week, but I’ll try this next weekend and post a pic for reference.

Mounted to the rear, there’s plenty of clearance for the liftgate. Looking forward to having the extra storage space for our roadtrips this summer. 👍

IMG_0855.webp
Looks really sharp!

Yes, if you happen to mount on the front two bar positions, I’d be extremely interested. My primary concern would be the stability at highway speeds and secondary would be the miles/KW penalty.

Thanks and enjoy your summer trips!
 

Simans82

Member
Joined
Feb 17, 2025
Threads
0
Messages
13
Reaction score
11
Location
Charlotte, NC
Vehicles
R1S Dual Large Performance
Looks really sharp!

Yes, if you happen to mount on the front two bar positions, I’d be extremely interested. My primary concern would be the stability at highway speeds and secondary would be the miles/KW penalty.

Thanks and enjoy your summer trips!
Here’s a pic of it mounted on the front two bars and moved as far back as it will go. It’s definitely more accessible in this configuration.

I know your motivation is different than mine regarding the positioning, but I personally think this particular box looks better mounted toward the rear.

Rivian R1T R1S Thule Motion 3 Roof Box XXL on R1S - More space, fits well, runs quiet IMG_0876
 

gyphon

Member
Joined
Dec 31, 2022
Threads
2
Messages
16
Reaction score
15
Location
Bay Area, CA
Vehicles
2025 R1S Tri Max / 2023 BMW iX M60
Here’s a pic of it mounted on the front two bars and moved as far back as it will go. It’s definitely more accessible in this configuration.

I know your motivation is different than mine regarding the positioning, but I personally think this particular box looks better mounted toward the rear.

IMG_0876.webp
Oh, perfect, thank you for this. There’s not nearly as much overhang as I thought there would be, although there is still some. Aesthetically speaking, I absolutely agree with you, it looks better in the rear.
 

Sponsored

Simans82

Member
Joined
Feb 17, 2025
Threads
0
Messages
13
Reaction score
11
Location
Charlotte, NC
Vehicles
R1S Dual Large Performance
We finished a 2,500 mile road trip a few weeks ago with this roof box. Great to have the extra space in the cabin, and especially nice to keep all of our sandy beach stuff up top instead of in the trunk.

We packed two beach chairs, a beach umbrella, four of the Thule duffle bags (stuffed full), and one carry-on piece of luggage in the roof box.

The only thing we noticed was a slight booming/bass noise with heavy cross winds, but that was short lived. There were a few parking garages along the way that we had to park in designated areas due to the overall height, but it wasn’t an inconvenience at all. At standard height, it fit under 7’ 6” with room to spare. So that was my go/no-go standard when approaching garages with height restrictions.

Loading and unloading was made pretty easy with the running boards. There were a few times I found myself tossing the bags toward the rear. As others have stated, moving the box to the forward position would likely be the best for loading and unloading.

I can only guess as to how much of an impact it had on efficiency. Over the last six years of owning and road tripping EVs, we’ve never paid much attention. We have kids so stopping for lunch or dinner and taking breaks is a regular and much needed occurrence anyway. Nothing drastic stood out to me regarding a drop in the mi/kWh.

As simple as it may be, we’re really satisfied with the roof box!

Rivian R1T R1S Thule Motion 3 Roof Box XXL on R1S - More space, fits well, runs quiet IMG_0980


Rivian R1T R1S Thule Motion 3 Roof Box XXL on R1S - More space, fits well, runs quiet IMG_1015
 

seanocono

Well-Known Member
First Name
Sean
Joined
Oct 18, 2022
Threads
2
Messages
460
Reaction score
676
Location
LA
Vehicles
GMC Sierra Denali EV, Lucid Gravity GT
Clubs
 
Your R1S looks fantastic. I admire how clean it is in all of your photos. I like your tires on the 22s too.
 

Simans82

Member
Joined
Feb 17, 2025
Threads
0
Messages
13
Reaction score
11
Location
Charlotte, NC
Vehicles
R1S Dual Large Performance
Your R1S looks fantastic. I admire how clean it is in all of your photos. I like your tires on the 22s too.
Thank you! I’m one of those people that will hand wash their car on road trips. It’s plenty weird, but I haven’t been able to shake the obsession of keeping a clean car over the years. 🙂

After correcting the paint, I ceramic coated the car when I first got it home a year ago. One thing that’s often lost in that conversation is just how little effort it takes to wash the car after a ceramic coating is applied. Regular wash maintenance becomes much easier. I referenced the condition of the paint at delivery in this thread.

Regarding the tires, I stumbled into the Continental Terrain Contact A/Ts when purchasing a set of sport darks for a neighbor. Long story, but I ended up with this set. I didn’t expect to have an A/T tire, but these have been great so far.
 
Last edited:

seanocono

Well-Known Member
First Name
Sean
Joined
Oct 18, 2022
Threads
2
Messages
460
Reaction score
676
Location
LA
Vehicles
GMC Sierra Denali EV, Lucid Gravity GT
Clubs
 
Thank you! I’m one of those people that will hand wash their car on road trips. It’s plenty weird, but I haven’t been able to shake the obsession of keeping a clean car over the years. 🙂

After correcting the paint, I ceramic coated the car when I first got it home a year ago. One thing that’s often lost in that conversation is just how little effort it takes to wash the car after a ceramic coating is applied. Regular wash maintenance becomes much easier. I referenced the condition of the paint at delivery in this thread.

Regarding the tires, I stumbled into the Continental Terrain Contact A/Ts when purchasing a set of sport darks for a neighbor. Long story, but I ended up with this set. I didn’t expect to have an A/T tire, but these have been great so far.
I am also one of those weirdos who hand washes their vehicles on roadtrips, much to my wife's chagrin.

I could tell that your R1S is ceramic coated. You did an awesome job. The shine on that Midnight paint is beautiful!
 

Simans82

Member
Joined
Feb 17, 2025
Threads
0
Messages
13
Reaction score
11
Location
Charlotte, NC
Vehicles
R1S Dual Large Performance
I am also one of those weirdos who hand washes their vehicles on roadtrips, much to my wife's chagrin.

I could tell that your R1S is ceramic coated. You did an awesome job. The shine on that Midnight paint is beautiful!
My wife really likes black cars, but I’m not so sure that would be the case if they weren’t (mostly) always this clean. 🤣
Sponsored

 
 








Top