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Thule Sidekick Roof Mounted Cargo Carrier Box - U-Bolt Mounts - 8 Cubic Feet
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Thule Sidekick Roof Mounted Cargo Carrier Box - U-Bolt Mounts - 8 Cubic Feet

Item # TH78GC
Retail:$537.81
Our Price: $499.95
You Save: $37.86
Roof Box
Shipping Weight: 21 lbs
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54 x 25 x 15. Roof box mounts to your crossbars with U-bolts and reinforcement plates. Locking lid opens from the passenger's side of your vehicle. Great for carrying luggage, groceries, and other gear. Impact-resistant polyethylene construction. Great Prices for the best roof box from Thule. Thule Sidekick Roof Mounted Cargo Carrier Box - U-Bolt Mounts - 8 Cubic Feet part number TH78GC can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (35)
  • Q & A (0)
  • Photos

Thule Roof Box - TH78GC

  • Aero Bars
  • Factory Bars
  • Round Bars
  • Square Bars
  • Extra Small Capacity
  • Thule
  • Short Length
  • Black
  • Passenger Side Access
  • Medium Profile

54 x 25 x 15. Roof box mounts to your crossbars with U-bolts and reinforcement plates. Locking lid opens from the passenger's side of your vehicle. Great for carrying luggage, groceries, and other gear. Impact-resistant polyethylene construction.


Features:

  • Cargo box mounts on your vehicle's roof rack to provide enclosed storage for your gear
  • Lid opens from the passenger's side for safety and convenience
  • Included lock helps deter theft
  • Aerodynamic design reduces wind resistance
  • Impact resistant, polyethylene construction ensures durability
  • Weather-resistant design helps keep cargo dry
  • Attaches to crossbars with included U-bolts with reinforcement plates


Specs:

  • Application: round, square, aero, elliptical, and most factory crossbars
    • Maximum crossbar diameter: 3-3/4"
    • Crossbar spread: 23-5/8" - 28"
  • Carrying capacity: 8 cu ft
    • Height above crossbars: 15-1/2"
  • Weight capacity: 75 lbs
  • Dimensions:
    • External: 54" long x 25" wide x 15-1/2" high
    • Internal: 48" long x 23" wide x 13-1/2" high
  • Weight: 20 lbs
  • Limited lifetime warranty


Sidekick Fit Diagram


682100 Thule Sidekick Roof Mounted Cargo Carrier Box - U-Bolt Mounts - 8 Cubic Feet

Replaces Thule 682

Installation Details TH78GC Installation instructions



Customer Satisfaction Score:


Customer Reviews

Thule Sidekick Roof Mounted Cargo Carrier Box - U-Bolt Mounts - 8 Cubic Feet - TH78GC

Average Customer Rating:  4.5 out of 5 stars   (35 Customer Reviews)

54 x 25 x 15. Roof box mounts to your crossbars with U-bolts and reinforcement plates. Locking lid opens from the passenger's side of your vehicle. Great for carrying luggage, groceries, and other gear. Impact-resistant polyethylene construction.

by:

This cargo box looks great on top of my Subaru. It was easy to install and it was very secure during my travels across southeast US. Had daughter, two teenagers, my dog, and myself traveling and the extra space was perfect. Cody O was wonderful during the ordering process over the phone and internet.



by:

I have been really happy with this roof box, I was concerned at first because it did not feel as heavy or sturdy as some I've had in the past but it's performed really well and the shape is great. Because of the shape it holds things like carry on luggage on their side, backpacks and lots of gear. A year in, still loving this purchase.



by:

Worked great on my 2022 Prius. Had to drill holes to make clamps fit the factory roof rack.



by:

This review is not about the Thule Sidekick I ordered. It is about etrailer. Their prices are very competitive and I received free shipping. I placed my order on a Friday, was promised delivery the following Thursday and my item was delivered two days earlier on Tuesday. I will certainly consider etrailer for future purchases.

Johnny

5/12/2023

No complaints, the Sidekick is a lower end cargo carrier but that is reflected in the price and it suits my needs just fine.



by:

This cargo carrier is perfect for our needs. Stacey with etrailer helped with ordering & any questions we had. The topper arrived quickly, we didn’t install immediately waiting on roof rack rails.
A week or so later ready to install we noticed a rivet missing on the front lock… took pictures & emailed Stacey. She called back within hours & the next day a replacement was on the way…..

We’d give 10 stars for her exceptional Customer Service! Thank you for exceeding our expectations!



by:

Quick delivery. We just put together the box, haven't used it yet, but everything looks good.

Jody

7/3/2023

Works great. Weve used it a half a dozen times, and it has worked well each time.



by:

The sidekick has been a great cargo box for road trips over the last year.



by:

This is a great addition to my Subaru Forester for camping and outdoor adventures! It holds up really well even during a rainstorm. Very happy to have purchased it.



by:

I have a 2016 ford focus se hatchback & I mounted this in the middle on rhino rack vortex bars. Looks awesome! It’s very sturdy & I can fit a decent amount in this box.



by:

We've used a few times for long trips with 5 kids and 2 adults. It definitely gave us the cargo space we needed for the trip.



by:

Got Very Frustrated on step one as Paper kept sticking to foam sealer, until I cut back nearly 12" of material!
Directions are MINIMALLY Clear. Luckily I am an Engineer and got lucky via deductive reasoning



by:

It works great. Easy enough to put together and install/remove from the car. We were torn between this and slightly bigger model. Could have went bigger, but this freed a lot of space and made packing Tetris much easier.



by:

This was a game changer! We have started making trips from TX to NC and NC to FL several times a year. After getting 2 adults, 2 teens and 2 dogs in my Lexus NX, there's not much room inside the car for much. Getting this Thule roof rack box has been great. Amazing how much stuff and then some will fit. Minimal noise and insignificant impact on mpg too. Great purchase.



by:

Meets its needs. Plastic is rather thin - definitely meant to haul lighter items, but is rather spacious for its compact length. Requires some assembly with two people. Spouse is happy because it fits some extra beach gear she wanted to haul on vacation.



by:

It’s been great overall, but the key did break in one of the locks which has been inconvenient.



by:

Like the product, good quality, easy as sembly



by:

Thank you for shipping so quick. I received it in 2 days.



by:

product arrived on time and in excellent condition.



by:

crap

Etrailer Expert

Heather A.

11/30/2022

Wow! I am sorry you had a bad experience with the cargo box. Thule is one of our most trusted brands so forgive me if I sound surprised. Can you give me more information about why the box is crappy? I am happy to help!



by:

Delivered Thule rooftop box on time in excellent condition.



by:

It arrived a bit banged up. There were a number of dents probably related to being banked around during shipping. Most popped out. One or two may not. I haven’t put it together, so maybe they’ll relieve. We’ll see

Etrailer Expert

Jenny N.

9/23/2022

I appreciate that you have popped out the dents however I will have our customer service team reach out to assist you.



by:

From purchase to delivery, etrailer was amazing. Thanks for making everything easy.



by:

Was a great fit for the Tacoma SX model.



by:

Looks nice



by:

One of the hinges were broken when I received the item


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Show More Reviews

See what our Experts say about this Thule Roof Box

  • Does Thule Sidekick Cargo Box Fit Factory Bars of 2016 Lincoln MKC
    Yes, I checked with Thule just now and they confirmed that their Sidekick cargo box part # TH78GC that you referenced is a confirmed fit for the factory crossbars of your 2016 Lincoln MKC.
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  • Best Value Roof Rack and Cargo bag For 2020 Jeep Cherokee With Raised Side Rails
    The best value option for the raised rails on the 2020 Jeep Cherokee is the Malone AirFlow2 Roof Rack, part # MPG215. The Malone Airflow2 is a set of aerodynamic low profile roof rack bars that can handle up to 165 lbs of weight. To install the bars you simply use the included security wrench to tighten them down onto the raised side rails. Please keep in mind that this will only fit your Cherokee if it has silver-colored rails. Some models have black colored rails which are too wide. I...
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  • How to Mount the Rhino-Rack Cargo Bag with a Thule Sidekick Cargo Box on a Roof Rack
    If you have the Thule Sidekick Cargo Box, part # TH78GC, mounted on your Honda CRV and want to add the Rhino-Rack Cargo Bag, part # RRLB200, there are two things you need to know. The first is that the Rhino-Rack Cargo Bag cannot be used on its own on a roof rack. In order to use it, you'll need a cargo basket. I recommend the Yakima SkinnyWarrior, part # Y07014. It fits factory bars and is our thinnest cargo basket. That leads me to the second thing you need to know. In order to mount...
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  • Will Yakima GrandTour Lo Roof Cargo Box Fit a 2015 Toyota 4Runner with OEM Roof Rack
    I do have a way for us to get the Yakima GrandTour Lo Rooftop Cargo Box # Y46FR on top of your 2015 Toyota 4Runner, but since the OEM crossbars are really close to the roof of your vehicle we have only found that the Thule Sidekick Roof Mounted Cargo Carrier Box # TH78GC can physically fit because it uses smaller U-Bolts. To install the GrandTour Lo we will need to use an aftermarket roof rack system and for that I recommend the Malone AirFlow2 Roof Rack # MPG215 which clamps directly...
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  • How to Help Secure the Cargo Inside of the Thule Sidekick Roof Mounted Cargo Carrier
    The Thule Sidekick Roof Mounted Cargo Carrier Box # TH78GC does not have any built-in mounting points inside of the carrier. The best way to help secure the cargo inside of the box would be to overpack the box. Use things like towels and blankets to add depth and padding for the cargo and fill in empty spaces to prevent as much movement.
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  • Roof Rack and Cargo Box Recommendation for a 2013 Hyundai Sonata
    The SportRack SkyLine XL Cargo Box SR7095 that you referenced will require you have a roof rack with crossbars installed. However, it would not be compatible with the crossbar spreads that are available on the roof racks that are confirmed to fit your vehicle. You would need to use a different box. First, let's start with a roof rack. For that I think you would like the SportRack Semi-Custom Roof Rack part # SR1002. For a similar cargo box that would fit this rack I would recommend the...
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  • Weight Capacity of Thule Sidekick Cargo Box
    The Thule Sidekick Roof Mounted Cargo Carrier Box # TH78GC has a 75 lb weight capacity. It has 8 cubic feet of carrying space and internal dimensions of 50" long x 23" wide x 15-1/2" high; it weighs only 20 lbs so it will be easy to handle and comes with a lifetime warranty, which speaks to how durable this box is.
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  • Does the Thule Sidekick Have Hinges, Locks, and a Seal
    The Thule Sidekick Roof Mounted Cargo Carrier Box # TH78GC does use a combination of hinges and struts to easily raise and lower the lid. It includes locks to deter theft of your gear and although there isn't a "seal", there is a foam gasket included to help keep your gear safe from the elements.
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    Image 1 for
  • Cargo Box Recommendation to Fit SportRack SR1010 on a 2013 Ford Edge
    I can't recommend you install the Sportrack part # SR1010 in a different location on the roof of your 2013 Ford Edge as that would void the warranty. For a smaller cargo box that would fit your smaller 26 inch crossbar spread you would want the Thule Sidekick part # TH78GC which has 8 cubic feet and would work well.
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  • Roof Cargo Bag To Fit Factory Roof Rack On 2019 Infiniti QX60
    I do have an option for you but the Thule Interstate Rooftop Cargo Bag part # TH869 tie downs will most likely not reach the cross bar with that much overhang like you mention. I looked up your vehicle's factory roof rack and it doesn't look like it has raised rails either so it would be difficult to tie a bag that size down with a cross bar spread of 30". I recommend to use the Rightline Gear Sport 2 Rooftop Cargo Bag part # RL100S20 which will hook on the inside of the vehicle without...
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    Image 1 for Image 2 for Image 3 for Image 4 for
  • Recommended Roof Rack for 2019 Honda Civic
    We do have a really nice selection of roof racks that will work great on your 2019 Honda Civic. I highly recommend the Yakima JetStream Roof Rack which consists of # Y00425 for the two 50 inch JetStream Crossbars, # Y28TR for the BaseLine Towers, # Y06182 for the Front Fit Kit, and # Y06183 for the Rear Fit Kit. This will provide you with an extremely aerodynamic roof rack with built-in windridges on the bars that help to control air flow and dramatically reduce wind noise and vibration....
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  • Will the Thule Sidekick Cargo Box Fit on a 2007 Saturn Outlook
    If your 2007 Saturn Outlook has a factory roof rack with crossbars that run side to side, then the Thule Sidekick Cargo Box, # TH78GC, will fit. This cargo box requires a minimum crossbar spread of 23-5/8 inches. You can check your crossbar spread by measuring from the center of one crossbar to the center of the other. If you just have side rails that run front to back and no cross bars or your crossbars cannot be adjusted further than 23-5/8 inches apart, then you will need to add the...
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  • Can I Carry A Small Rooftop Cargo Box On Factory Roof Rack With Crossbar Spread Of 32"
    I do have a solution for you, but it will not be a Thule Sidekick. The Sidekick will fit on a vehicle that has a crossbar spread of 23-5/8" to 28", which is shorter than the 32" the factory rack on your 2021 RAV4 provides. Since your crossbar spread is fixed at 32", you will be limited to roof top cargo boxes that are at least medium in size. The small and extra small offerings will not work with crossbar spreads of 32". I recommend the SportRack Horizon Rooftop Cargo Box - 16 cu ft - Black,...
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  • 2016 Chevy Trax Roof Rack Recommendation to Carry Thule Sidekick Cargo Box
    Sounds like you have the factory raised side rails on your 2016 Chevy Trax. If so, you would want the Thule Evo Raised Rail Feet # TH710401 and 53" WingBar Evo Crossbars # TH711420 to allow you to carry the Thule Sidekick part # TH78GC. Raised roof rails are ones that you could slide your hand underneath. If instead you had flush rails that you couldn't slide your hand underneath (not as likely), then you would want the Rhino Rack part numbers # RRVA118B-2 and # RRSX040 to complete the...
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  • How to Determine if Thule Sidekick will Fit Roof Rack on 2010 Chevy Aveo
    The Thule Sidekick part # TH78GC that you referenced can fit crossbars that are between 23-5/8 inches and 28 inches apart and are less than 3-3/4 inches in diameter. Without knowing more info on your crossbars I can't say for certain if this will work but you can easily measure your roof rack to determine.
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  • What Cargo Box will Fit with My 23-Inch Basket on My 2018 Toyota 4Runner?
    As far as mounting the Thule Force XT L # TH6357B to your Malone AirFlow2 Crossbars - 58" # MPG216 on your 2018 Toyota 4Runner, the fitment will not work due to the 7-inch length of the feet that extend beneath the AirFlow2. This 7 inch length will interfere with the mounting clamps on the Force XT L, not allowing for enough usable crossbar space. However, if your usable crossbar space between the towers (with the basket attached) measures at least 25 inches, then you can use the Thule...
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  • Will the Thule Sidekick Fit on My 2008 Chrysler Pacifica with Factory Roof Rack
    I spoke to my contact at Thule and, the TH78GC Sidekick will most likely mount to your factory roof rack as long as you have two cross bars and they will adjust for the following measurements that are required for mounting the cargo box. The Sidekick needs 23-5/8 inch minimum spacing and 28 inch maximum spacing of cross bars front to back on your vehicle. The sidekick also requires 14-3/8 inch mounting width and 7-1/2 inches of rear clearance. There are four fixed holes for mounting u-bolts...
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  • Roof Mounted Cargo Box and Roof Rack Crossbars for 2012 Volkswagen Tiguan
    Once the Tiguan is equipped with crossbars, the Thule Sidekick Roof-Mounted Cargo Box you referenced, part # TH78GC will fit your 2012 VW Tiguan. A good quality roof rack that's a standard square shaped crossbar and fits the majority of roof accessories is the Thule SquareBars, part # TH712200. If you prefer an upgraded crossbar that reduces wind noise and drag you can go with the Thule WingBars, part # TH711200 in silver or # TH711220 in black. Both bar styles use the same Evo raised...
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  • Parts Needed for Installation of a Roof Rack Cargo Box on a 2009 Volkswagen Passat Sedan
    The Thule Sidekick is recommended as a fit for your 2009 VW Passat sedan. Since you have a sunroof, you will need to be careful when opening it with any roof mount accessories, like the cargo box, installed. You may find that with some accessories you cannot open the sun roof. The Thule WingBar Evo roof rack is a great choice for your Passat Sedan. It consists of 53 inch WingBars, # TH711400 in silver or # TH711420 for black, a Rapid Traverse Foot Pack, # TH480R, and Roof-Rack Fit Kit,...
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  • Which Roof Rack and Cargo Cages are Available for a 2007 Chevrolet HHR?
    We can set you up with everything you'll need to install a roof rack or cargo carrier on your 2007 Chevy HHR. I recommend going with a hitch-mounted cargo carrier over a roof rack; the only instance in which the rack has an advantage is installation. Aside from that, you will likely find more uses for a hitch, and even if you only use it to haul cargo, it is going to be easier to use a hitch-mounted carrier than a rooftop box. To use a hitch-mounted cargo box, you will first need to install...
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  • Will Thule Sidekick Roof Mounted Cargo Box fit a 2006 Dodge Dakota
    You will need a roof rack on the truck for the Thule Sidekick Roof Mounted Cargo Box to attach to. I have added links to roof rack packages for both the 2006 Dakota Extended Cab and Quad Cab. Once you have the roof rack on the truck, then you could use the Thule Sidekick. Roof mounted cargo boxes need a roof rack with cross bars so they have something to attach to.
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  • Recommendations for Carrying Skis on the Roof of a 2008 Honda CRV with a GPS Antenna
    I checked with Thule and the Thule Force XL, part # TH6358B, is a confirmed fit for your 2008 Honda CRV with factory cross bars. This box measures 84 inches in length, you will want to measure your roof to see if this would be too long to be comfortable for you. I would suggest measuring from the GPS antenna forward to see how far the box would reach over the windshield, if at all. This box can carry 6-8 skis that are not more than 198 centimeters in length. The Thule Pulse L, part #...
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  • Roof Mounted Cargo Box Recommendation for 2013 Honda CR-V w/ OEM Crossbars
    None of the Roof Mounted Cargo Boxes we offer from Yakima, Thule, Prorack, Rhino Rack, SportRack or Whispbar would include crossbars, so there should be no problem. Your CR-V has a pretty short roof on it, so you'll want to avoid getting a cargo box that's so long that you can't open the rear vehicle hatch without the hatch hitting the rear of the cargo box. The Thule Pulse, part # TH614 is a likely fit, but you'd want to take a measurement off your vehicle roof to confirm fit. Measure...
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Info for this part was:

Employee Andrew K
Installed by:
Andrew K
Employee Jameson C
Expert Research:
Jameson C
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Matthew S
Written by:
Matthew S
Employee Daron K
Edited by:
Daron K
Employee Aidan B
Video by:
Aidan B

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