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

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.
  • All Info
  • Reviews (33)
  • 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   (33 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:

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:

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:

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



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:

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:

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:

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:

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:

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:

Like the product, good quality, easy as sembly



by:

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



by:

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



by:

product arrived on time and in excellent condition.



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:

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:

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



by:

Perfect! Just what we were hoping for.


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Show More Reviews

See what our Experts say about this Thule Roof Box

  • Cargo Box Recommendation for a 2013 Cadillac SRX Factory Crossbars
    I checked with Thule and they list their Sidekick part # TH78GC as a fit for the factory crossbars of your 2013 Cadillac SRX so it would work well for you.
    view full answer...
  • Will Thule Sidekick Fit Roof Rack Installed on 2009 Honda CR-V
    I did receive your picture and I confirmed with Thule that it is not a Thule roof rack that's been installed on your 2009 Honda CR-V. However, the Thule Sidekick # TH78GC may still work for you. To find out for sure you can measure the crossbars. As long as they are no more than 3-3/4 inches wide the Sidekick will fit. It's designed for aero shaped bars like you have. Another good measurement to take is from the center of the front crossbar back to the antenna. You'll need at least...
    view full answer...
    Image 1 for
  • How Does the Thule Sidekick Install on Crossbars
    If you were near St. Louis, MO you could come out and we would be happy to install the # TH78GC for you. It's really not too hard to install. For the most part you would just need to set the box on the crossbars of your vehicle and then run the included u-bolts up around the crossbars and then through the box using the included wing nuts to tighten them. To make it easier to get up high enough to install the box you may be interested in the tire step part # HE4040.
    view full answer...
  • Roof Cargo Box Compatible with OEM Roof Rack on a 2015 Toyota 4Runner Limited
    The only cargo box that has been verified to fit your 2015 Toyota 4Runner Limited OEM roof rack is the Thule Sidekick # TH78GC. All of the other options basically say there isn't enough room for the mounting hardware. If you want/need to use something larger then we need to get you an aftermarket roof rack system. If you'd like to upgrade your crossbar system just let me know and I'll be happy to make some recommendations for you, otherwise have fun with the Sidekick! I've attached a review...
    view full answer...
  • Can Thule Sidekick Roof Mounted Cargo Carrier Box be Mounted Offset on Roof Rack
    Yes, you can offset the Thule Sidekick Roof Mounted Cargo Carrier Box # TH78GC as opposed to mounting it directly in the center of the crossbars on your 2021 Kia Telluride. This opens up to the passenger side of the vehicle so I recommend mounting it closer to the passenger side of your vehicle so you aren't having to reach as far to gain access to the inside of the box.
    view full answer...
  • Cargo Box Recommendation for a 2014 Dodge Journey
    For a smaller roof top cargo box for the factory crossbars of your 2014 Dodge Journey I would recommend the Thule Sidekick Cargo Box part # TH78GC. This would do a great job carrying your extra clothes and shoes. If you are in need of a roof rack for your vehicle follow the link I also attached to see all the available racks for your vehicle.
    view full answer...
  • Is the Thule Sidekick Roof Top Cargo Box Waterproof
    The Thule Sidekick Cargo Box # TH78GC is designed in such a way to help keep water from the road and elements out and off of your gear. However, with that being said, it is not waterproof. There's always a chance water can get inside the box and on your things. So if you're carrying something that absolutely cannot get wet I recommend sealing it in some sort of bag and then put it in a cargo box or carrying it inside the vehicle.
    view full answer...
  • 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.
    view full answer...
  • Recommended Cargo Box for a 2013 Toyota Highlander with Factory Rack
    I checked with a few of the major cargo box manufactures, Thule/Yakima and only found one compatible option which is the Thule Sidekick Roof Mounted Cargo Carrier Box part # TH78GC. This cargo box has a 8 cu. ft. capacity which is still plenty to free up some space inside the vehicle. It has locks for security and is one of the more cost effective options on the market.
    view full answer...
  • 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.
    view full answer...
  • Replacement Side Hinge For Thule Sidekick Roof Mounted Cargo Box
    I spoke to my contact at Thule and they told me the hinge for the Thule Sidekick Cargo Box is not an item that is sold as a separate item. You may want to remove the hinge and take it to a local hardware store. Most stores have door hinges that are very similar and may have just what you are looking for.
    view full answer...
    Image 1 for
  • How to Determine if Thule Sidekick Cargo Box Will Fit Roof Rack
    You didn't mention the specific model 2015 Toyota that you have but if the bars are between 23-5/8" - 28" and are less than 3-3/4 inches in diameter the Thule Sidekick part # TH78GC will fit it and work well. Dimensions: External: 54" long x 25" wide x 15-1/2" high Internal: 50" long x 23" wide x 13-1/2" high
    view full answer...
  • Fit of Thule Sidekick Roof Cargo Box on 2013 Subaru Outback w/ Factory Roof Rack Crossbars
    The Thule # TH78GC Sidekick Roof Mounted Cargo Box you mentioned is indeed compatible with the factory roof rack crossbars on your 2013 Subaru Outback. I've confirmed this with Thule for you.
    view full answer...
  • 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.
    view full answer...
  • How to Mount Karrite Voyager Cargo Box to Roof Rack
    The Karrite Voyager was a distant relative to the current Thule Sidekick Cargo Box # TH78GC. The box uses standard U-bolt hardware to attach to roof rack crossbars and tightens down with the included plates and threaded knobs. I have attached the complete installation instructions for the Thule Sidekick that you can take a look at, along with an image that clarfies where each piece of the hardware goes. The process will be identical on your Karrite Voyager.
    view full answer...
    Image 1 for
  • 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...
    view full answer...
  • Does the Thule Sidekick Roof Mounted Cargo Box Fit a 2008 Ford Escape w/ a Factory Roof Rack?
    The Thule Sidekick Roof Mounted Cargo Carrier Box item # TH78GC will fit the factory crossbars on your 2008 Ford Escape with no issues. You will want to make sure they can be adjusted so the crossbar spread is between 23-5/8" - 28". Additionally, for the rear hatch to open without interference you will need to have 51-7/8" of space between the front crossbar and the line where the rear hatch meets the rest of the body of your Escape.
    view full answer...
  • Rooftop Cargo Carrying Solution for 2015 Nissan Pathfinder with Factory Crossbars
    I have a solution for you, but I would recommend putting a cargo bag up on top of a moon roof made of glass. The Thule Sidekick part # TH78GC has been confirmed to fit the factory crossbars on your vehicle so that would be your best option.
    view full answer...
    Image 1 for
  • Reducing Wobbling on a Thule Excursion Roof Top Box
    There are a few things that you can do to ensure a fit, and approach the wobble of your existing box without making a purchase. First, you'll want to make sure that your crossbar kit is spread out as far as the mounting system or crossbars will allow. This will give the roof box a better platform to rest on while driving, and reduce its wobble. Next, when you load the roof box, you'll want to make sure that less of the weight is put into the front of the box, and put more into the middle...
    view full answer...
  • Does the Thule Sidekick Cargo Box Have to be Centered on the Cross Bars of a Roof Rack
    You can mount the Thule Sidekick to one side or the other when installing it on a roof rack cross bar. We recommend you put it closer to the passenger side so that if you were on the side of the road you would be on the side of your vehicle that would be on the opposite side of traffic.
    view full answer...


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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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