1. Accessories and Parts
  2. Thule
  3. Roof Basket
  4. Extension
Extension Piece for Thule Canyon XT Roof Cargo Basket - 20" Long

Extension Piece for Thule Canyon XT Roof Cargo Basket - 20" Long

Item # TH8591XT
lowest price pledge
Our Price: $189.95
You Save: $104.09
Accessories and Parts
This item qualifies for Free Shipping
Shipping Weight: 14 lbs
In Stock
Thule Extension Accessories and Parts - TH8591XT
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Upgrade the carrying capacity of your Thule Canyon XT roof basket with this 20" long custom extension. Just slide the extension into the tubular bars of your basket and secure with included hardware and Allen wrench. Sturdy steel construction. Call 800-298-8924 to order Thule accessories and parts part number TH8591XT or order online at etrailer.com. Free expert support on all Thule products. Guaranteed Lowest Price and Fastest Shipping for Extension Piece for Thule Canyon XT Roof Cargo Basket - 20" Long. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (2)
  • Q & A (17)
  • Photos
  • Why etrailer?

Thule Accessories and Parts - TH8591XT

  • Roof Basket
  • Extension
  • Thule

Upgrade the carrying capacity of your Thule Canyon XT roof basket with this 20" long custom extension. Just slide the extension into the tubular bars of your basket and secure with included hardware and Allen wrench. Sturdy steel construction.


  • Custom extension adds 20" of length to your Thule Canyon XT roof cargo basket (TH859XT - sold separately)
  • Easy installation between the 2 main pieces of the carrier
    • Secures with included hardware and Allen wrench
  • Welded steel construction


  • Dimensions: 20" long x 40" wide x 6" tall
  • Extension weight: 10 lbs
  • Limited lifetime warranty

Thule Canyon Basket with Extension

This 20" long extension piece lengthens your Thule Canyon XT basket to increase your cargo carrying area.

Easy Installation

To install this extension between the carrier's 2 main pieces, just slide the ends of the extension into the bars of the basket for a snug fit. Hardware and an Allen wrench are included to secure the 3 pieces of the basket.

8591XT Thule Extension for Canyon Roof Mounted Cargo Basket

Installation Details TH8591XT Installation instructions

Customer Reviews

Extension Piece for Thule Canyon XT Roof Cargo Basket - 20" Long - TH8591XT

Average Customer Rating:  5.0 out of 5 stars   (2 Customer Reviews)

Upgrade the carrying capacity of your Thule Canyon XT roof basket with this 20" long custom extension. Just slide the extension into the tubular bars of your basket and secure with included hardware and Allen wrench. Sturdy steel construction.

- TH8591XT

Extension worked great. Just wish they sold them in one foot lengths . The two extra feet was a little too much for my Cherokee 773628

- TH8591XT

Product arrived in good condition and the shipping was very fast 264280


Ask the Experts about this Thule Accessories and Parts

  • Net for Thule TH859XT-8591XT Canyon XT with the Extension
    The Curt Stretchable Cargo Net, part # C18201 with an unstretched dimension of 38 x 65 would fit the 69 x 40 Thule # TH859XT-8591XT Canyon Cargo Basket with Extension absolutely perfectly. I've linked to a product video featuring the Thule Canyon XT cargo basket.
    view full answer...
  • Will the Thule Canyon XT TH859XT with Extension Piece 8591XT Fit a 2018 Subaru Forester
    Yes, you can use the Extension Piece for Thule Canyon XT Roof Cargo Basket part # TH8591XT with the Thule Canyon XT Roof Cargo Basket part # TH859XT on your 2018 Subaru Forester. The overhang of the basket will just be more but you can choose to have this in the front, the rear, or split for the front and rear. I recommend you pick the position that allows you to still open your hatch fully.
    view full answer...
  • Thule Canyon Roof Basket with Extension Compatibility with 2018 Subaru Forester
    On your 2018 Subaru Forester, the Thule Canyon XT Roof Cargo Basket - Steel - 69" x 40" x 6" - 150 lbs # TH859XT-8591XT includes the extension you mentioned and will absolutely fit the roof rack on your vehicle. If you don't already have the roof rack, then I recommend the Thule WingBar Evo Crossbars - Aluminum - Black - 47" Long # TH711220 and the Thule Rapid Crossroad Foot Pack # TH450R if you have the raised side rails. If you don't have the raised rails, then I recommend the Thule...
    view full answer...
  • Will Thule Canyon Roof Top Basket Cargo Carrier with Extension Fit on a 2008 Hummer H3
    The Thule Roof Top Basket Cargo Carrier Extension, # TH8591XT, is an add on to the Thule Canyon XT Roof Top Basket Cargo Carrier, # TH859XT. If your 2008 Hummer H3 has a factory roof rack and you have the Canyon XT Roof Top Basket, the extension will work on your vehicle. If you do not have a cargo basket yet, you can purchase the Canyon XT cargo basket with the extension with part # TH859XT-8591XT. I also recommend consulting the vehicle owners manual to determine the weight capacity...
    view full answer...
  • Will the Thule Canyon XT TH859XT Fit a 2013 Subaru WRX Hatchback
    Yes, I checked with Thule and the Thule Canyon XT Roof Cargo Basket part # TH859XT is a confirmed fit for your 2013 Subaru WRX Hatchback. If you like, you can also add the Thule One-Key System Lock Cylinders part # TH450400 which will allow you to lock the basket to your vehicle or the Extension Piece part # TH8591XT to provide you with an additional 20" of space.
    view full answer...
  • Best Roof Basket for Carrying Lumber
    I have a recommendation, but the Thule Canyon XT # TH859XT is not my first choice for carrying lumber mainly because of the wind fairing and the size. While the basket can be expanded to 70" long with the extension piece # TH8591XT, that is still not long enough for your lumber, and you'd have to load it at an angle, because of the lip where the wind fairing is at the front. For lumber-carrying baskets, I prefer the etrailer Medium Cargo Basket # e98914. You can remove the front wind-fairing...
    view full answer...
  • Fitting a Roof Cargo Basket to a Truck Bed Camper Shell With Thule Roof Tracks
    I have a solution for you, but its extremely unlikely that you'll be able to get the rack to line up properly with the tracks on your vehicle. Thule tracks have a matching fit kit for roof racks that includes the correct bolts to mount a roof rack as part # THKIT3101. These will fit the channel of the tracks properly and allow you to mount a roof kit. I reached out to Thule to help find the lowest-profile kit for you and we came up with the following kit: - Thule Rapid Podium...
    view full answer...
  • Will Thule Cargo Basket and Rhino-Rack Cargo Basket Fit 2015 Toyota 4Runner With Factory Crossbars
    Yes, both of the roof baskets you asked about, the Rhino-Rack Roof Mounted Steel Cargo Basket # RMCB and Thule Canyon XT Roof Cargo Basket # TH859XT will fit the factory crossbars on your 2015 Toyota 4Runner. Between these two options I strongly recommend the Thule Canyon basket because it has a larger space to carry your cargo than the Rhino-Rack, can be locked with Thule One-Key System Lock Cylinders # TH450400 while the Rhino-Rack does not have that option, and comes with a lifetime...
    view full answer...
  • How Many # TH8591XT Extensions Can Be Used w/ Thule Canyon Roof Mounted Cargo Basket
    According to my Thule representative, they do NOT recommend using more than one # TH8591XT extensions. Once additional extensions are added, the basket will lose its structural rigidity and can sag.
    view full answer...
  • Can I Use the SUP Taxi Paddleboard Tie Down with a Thule Canyon Cargo Basket
    I have a solution for you, but even with the 20" Extension # TH8591XT added to the Thule Canyon # TH859XT, the Canyon is only going to be 69" long and I can't imagine that you'd be able to fit a full sized paddleboard inside it. Additionally, the Thule SUP Taxi # TH810001 is not designed to fit on the bars of the Thule Canyon securely so that's not really an option. With that said, both the Canyon and SUP Taxi can be easily installed and removed as needed, so you can just remove the...
    view full answer...
  • Recommended Rooftop Cargo Basket for 2005 Ford Escape with Factory Roof Rack
    The Surco Safari Rack 5.0 Rooftop Cargo Basket # SPS4550-Y400 is designed specifically for installation on Yakima brand roof racks but we do offer cargo baskets that will work on the factory-installed roof rack on your 2005 Ford Escape XLT. All you need to do is measure your cross bars. You'll want to measure their center-to-center spread and also the bars' own width and height as these factors determine which rooftop basket will fit on your rack. Some baskets require your bar spread...
    view full answer...
  • How Tall is the Thule Canyon XT Roof Cargo Basket 859XT
    The 6" height that you referenced for the Thule Canyon XT # TH859XT is actually the overall height. This doesn't include the mounting hardware though. As long as you have more than 6" of clearance between your roof rack and garage opening the Canyon XT will fit! Whenever you do go to remove the basket it is actually quite easy. If you check out the attached photo you can see how the mounting hardware installs with just a U-Bolt and the hand-tightening knobs. I have also attached a review...
    view full answer...
  • Options to Carry a Roof Basket on a 2018 BMW X3
    I do have an option for you but as of (April 2018) we do not have any custom fit roof racks confirmed to fit your 2018 BMW X3. Therefore, in order to use a roof basket you will want to use a universal roof rack like the SeaSucker Monkey Bars Roof Rack part # 298-SX6000B which mounts to the roof via vacuum cups and will not require any modifications to the vehicle. Then for a roof basket I recommend the Thule Canyon XT Roof Cargo Basket part # TH859XT. The Thule Canyon has a built-in fairing...
    view full answer...
  • Thule Roof Rack and Cargo Basket for a 2011 Chevy Express Van
    Yes, you can install a Thule roof rack and cargo basket on your 2011 Chevy Express Van using the following parts: 69 inch Thule ProBars, part # TH713600 Rapid Gutter Feet, part # TH300R Then you can use the Canyon, # TH859XT, with the extension # TH8591XT. I have linked a review video of the Canyon for you.
    view full answer...
  • Is there an Extension for Pro Series Roof Mounted Cargo Basket
    The Pro Series roof mounted cargo basket # PS63156 does not have an available extension. There are other baskets that do if you do not already have a basket. Rola basket # 59504 uses extension # 59505. Curt basket # C18115 uses extension # C18117. Thule basket # TH859XT uses extension # TH8591XT. Yakima basket # Y07070 uses extension # Y07074. SportRack basket # SR9035 uses extension # SR9036. Yakima Basket # Y07080 uses extension # Y07082.
    view full answer...
  • Largest Cargo Basket Recommendation for a 2008 Ford Expedition EL
    Sounds like you are looking for the largest cargo basket available that is confirmed to fit your 2008 Ford Expedition. I checked with Thule and the Canyon XT part # TH859XT has been confirmed to fit your vehicle. When you combine it with it's extension piece # TH8591XT you would have a cargo basket that is 64 inches long by 40-3/4 inches wide by 7-1/4 inches tall.
    view full answer...
  • Recommended Cargo Carrier And Ladder Rack For 2020 Ram 2500 W/ BAK Revolver X4 Tonneau Cover
    Since you have the BAK Revolver X4 Hard Tonneau Cover like the # BAK79213 on your 2020 Ram 2500, the only ladder rack confirmed to fit is the Thule TracRac SR Sliding Truck Bed Ladder Rack # TH43003XT-501 if you have a 6-1/2' bed without RamBox, or # TH43003XT-000 if you have an 8' bed. Since the TracRac SR has standard T-slots on the load bars, you would be able to use a Thule Cargo Basket like the # TH859XT which is 49" long x 40" wide, and if you would like a longer basket you could...
    view full answer...

  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality accessories and parts for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate accessories and part information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Mike L
Edited by:
Tyler C
Video by:
Dustin K
Installed by:
Hayden R
Updated by:
Sarah W
Updated by:
Matthew S
Written by:
Daron K

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time.