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Thule Force 3 Rooftop Cargo Box - XXL - 21 cu ft
Thule

Thule Force 3 Rooftop Cargo Box - XXL - 21 cu ft

Part Number: TH27SA
$999.95
Roof Box
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No such thing as an off-season? This roof box is built for year-round adventure. It works for a family of five or a car full of friends. Load it up and roll out - and when you get home, no need to unload or take it off. Great Prices for the best roof box from Thule. Thule Force 3 Rooftop Cargo Box - XXL - 21 cu ft part number TH27SA can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Thule Roof Box - TH27SA

  • Aero Bars
  • Factory Bars
  • Round Bars
  • Square Bars
  • Extra Extra Large Capacity
  • Thule
  • Extra Extra Long Length
  • High Profile
  • Black
  • Dual Side Access

No such thing as an off-season? This roof box is built for year-round adventure. It works for a family of five or a car full of friends. Load it up and roll out - and when you get home, no need to unload or take it off.


Highlights

  • Never Take It Off Your Roof: Diamond-textured surface hides scratches, so you can leave it on all year.
  • Quick, Tool-Free Mounting:Installs in minutes with hand-tightening torque knobs.
  • Reliable Weather Protection: Built tough to shield your gear from rain, snow, and road debris.
  • Spacious Interior: Fits duffel bags, camping gear, or luggage for the whole family.
  • Locks You Can Trust: Keeps your gear safe, so you can confidently step away from your vehicle.
  • Opens From Both Sides: Access your gear safely, whether parked roadside or in a tight garage.

Features to Know About

Rugged Design for Year-Round Adventures

Thule Force 3 on small carThule Force 3 diamond-plated AeroSkin surface

Some roof boxes are designed to turn heads with sleek angles and glossy finishes, but those don't always hold up to real-world use. Hail, road debris, and low-hanging branches leave their mark, and constantly taking the box on and off your car gets old fast. The Thule Force 3 gives you the best of both worlds - a rugged, diamond-plated AeroSkin surface that won't highlight every scratch. Leave it on year-round and stay ready for your next adventure.

Fits the Whole Crew

Thule Force 3 fits the whole familyThule Force 3 internal tie-downs

You can fit a ton in this box - duffel bags, tents, climbing gear, or just the stuff that won't squeeze into the back of your car. Bringing shorter skis? Toss those in too. It's built for camping weekends, cross-country road trips, or that Christmas run to Grandma's. And the best part? There won't be a stack of gear in your hatch blocking your back window.

No Over-Torquing, No Crossbar Damage

Thule Force 3 torque knobs and crossbar clamps

Installing the box couldn't be easier. No wrenches, no guesswork - just set it on your crossbars, insert the clamps, and tighten them by hand. When they're fully secured, you'll hear a click, so you know they're locked in place.

Secure Tie-Down Points

Thule Force 3 intermnal tie downs up close

Inside, built-in anchor points give you a secure spot to attach the three included tie-down straps, keeping your gear from shifting on bumpy roads. No more unpacking a jumbled mess when you arrive - just grab your gear and go.

Dual-Side Access for Safer, Smarter Unloading

Thule Force 3 opening from passengers sideThule Force 3 opening from drivers side

The Force 3 makes unloading easier - and safer - especially if you have to pull to the side of the road or park in a tight garage. The lid opens from either side, so you can grab your gear without stepping into traffic.

Specs

Application:

  • Round, square, aero, and most factory crossbars

Crossbars:

  • Maximum crossbar dimensions: 3-1/2" wide x 1-11/16" tall
  • Crossbar spread: 23-5/8" - 35-1/2"

Capacity:

  • Carrying capacity: 21 cu ft
  • Ski/snowboard capacity: 5 - 7 pairs of skis or 3 - 5 snowboards
  • Maximum ski length: 215 cm

Dimensions and Weight:

  • External: 91-1/2" long x 35-1/8" wide x 18" tall
  • Internal: 88-1/8" long x 30-1/2" wide x 15-1/2" tall
  • Box weight: 52 lbs

Color & Construction:

  • ABS plastic with AeroSkin diamond texture lid
  • Made in the USA

Warranty:

  • Limited lifetime


645950 Thule Force 3 XL Rooftop Cargo Box - 21 cu ft

Replaces Thule TH6359B

Installation Details TH27SA Installation instructions



Ratings & Reviews

5.0

1 reviews
No such thing as an off-season? This roof box is built for year-round adventure. It works for a family of five or a car full of friends. Load it up and roll out - and when you get home, no need to unload or take it off.

by:

Prompt,polite,called ahead to make sure I was home


1
1

See what our Experts say about this Thule Roof Box

  • Will Thule Force 3 XXL Fit on a 2024 Ford F-150
    Hey Wylie, thanks for reaching out! The Thule Force 3 XXL Rooftop Cargo Box # TH27SA will definitely fit your 2024 Ford F-150, but we'll have to get you setup with a roof rack first. I really like the Inno Aero Roof Rack # IN57RV because of how slick and simple this system is, and it will pair up great with the Thule box, so you'll be good to go! What do you plan on using the cargo box for?
    view full answer...
  • What are the Internal Dimensions for the Thule Force 3 Roof Cargo Boxes?
    Hey Stan, thanks for reaching out! Here are the inside dimensions of the roof box you're asking about, as well as a linked photo of the roof box comparison chart from the Thule website that you can reference: - Thule Force 3 M # TH47SA - 65-7/8" long x 27-1/4" wide x 15" tall - Thule Force 3 L # TH77SA - 72" long x 20-1/8" wide x 14-1/2" tall - Thule Force 3 L # TH67SA - 73-1/2" long x 28-3/4" wide x 14-1/2" tall - Thule Force 3 XXL # TH27SA - 88-1/8" long x 30-1/2" wide x 15-1/2"...
    view full answer...
  • How Many Pairs of Skis Can the Thule Force 3 XXL Cargo Carrier Carry
    Hey Emmanuel, sounds like a fun trip you have planned where are you headed? In any case, the Thule Force 3 XXL Rooftop Cargo Carrier # TH27SA can carry 5 -7 pairs of skis, so, plenty. This cargo carrier can also carry 3-5 snowboards as well, but you'd have to carry one or the other. If there is anything else I can help you with, please feel free to drop a comment and let me know!
    view full answer...
  • Are Tools Needed To Install The Thule Force 3 XXL Rooftop Cargo Box?
    Hello Tobi, thanks for reaching out. You will not need any tools to install the Thule Force 3 XXL Rooftop Cargo Box # TH27SA on your crossbars. This box uses "quick-grip" clamps which allow you to easily attach the box to the crossbars without any tools. You just have to tighten the hand knobs. The same goes for removing the box. You can do it all by hand. Reply below with any other questions or comments and I will get back to you.
    view full answer...
  • What to Think About When Purchasing a Roof Cargo Box for a New Vehicle
    Hey Renzo, thanks for reaching out! Choosing the correct cargo box depends on the size of your vehicle and what kind of space you have to work with. For example, the Thule Force 3 L # TH77SA is 75-1/8" long x 24-3/4" wide x 16-3/4" tall while the Thule Force 3 XXL # TH27SA is 91-1/2" long x 35-1/8" wide x 18" tall so it gives you more cargo space, but it also is more likely to interfere with a rear hatch if that's something you all have. If you can let me know what vehicle you all purchased...
    view full answer...
  • Are Thule Force 3 Rooftop Cargo Boxes Made In the USA
    Hey Luc, yes the Thule Force 3 XXL Rooftop Cargo Box # TH27SA is made in the USA. If there is anything else I can do to help you, please feel free to drop a comment and let me know!
    view full answer...
  • What Is the Load Capacity of the Thule Force 3 Cargo Boxes
    Hey Dylin, all of the Thule Force 3 cargo boxes # TH27SA, # TH47SA, # TH67SA, # TH77SA, and # TH87SA have a load capacity of 165 lbs. Are you taking any cool trips where you going to be using this carrier? Please feel free to let us know how it goes, and let me know if there is anything else I can do for you!
    view full answer...
  • Will the Thule Force 3 Rooftop Cargo Box TH27SA Fit a 2006 Acura MDX?
    It definitely will! The Thule Force 3 Rooftop Cargo Box item # TH27SA attaches to round, square, aero, and most factory crossbars. Not sure what kind of roof rack set up your 2006 Acura MDX has but so long as you can place those crossbars so they're somewhere between 23-5/8" - 35-1/2" apart you'll be good to go. What kind of crossbars do you have?
    view full answer...
  • Can The Thule Force 3 XXL Rooftop Cargo Box TH27SA Be Opened From Both Sides?
    Hello JR, thanks for reaching out. Yes, the Thule Force 3 XXL Rooftop Cargo Box # TH27SA can be opened from either side, just like the other Thule boxes you saw. You should not open both sides at the same time though, or it can be really difficult to get it closed again.
    view full answer...

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Info for this part was:

Employee Matthew S
Written by:
Matthew S
Employee Daron K
Edited by:
Daron K
Employee Michael B
Updated by:
Michael B

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