Thule's 421 Xsporter rack system mounts on the bed rails of your truck, and accommodates various Thule carriers and loads. The rack's two load bars can be raised and lowered — great for loading and unloading bikes, short boards, or snow boards from your carrier. Raise your cargo up, and you can use your truck bed for storing other items.

Swift-looking aerodynamic-styled Rapid Aero™ load bars handle loads up to 450 pounds. You can lock the rack with one key for added security. All Thule equipment passes tough European safety standards for car racks.

Product Highlights:

  • two load bars with four supports
  • mounts on rails of truck bed
  • four rack locks included
  • weight capacity: 450 lbs.
  • warranty: limited lifetime
  • Our 60-day money-back guarantee

Hands-on research

What's in the box?

  • 2 Right-side upright support assemblies
  • 2 Left-side upright support assemblies
  • 4 Right-side base angle endcaps
  • 20 Self-tapping screws
  • 4 Left-side base angle endcaps
  • 2 Right-side upright support upper endcaps
  • 2 Left-side upright support upper endcaps
  • 2 Right-side upright support lower endcaps
  • 2 Left-side upright support lower endcaps
  • 2 Right-side clamp handle assemblies
  • 2 Left-side clamp handle assemblies
  • 4 Locks
  • 4 Pivot-pins (pre-installed)
  • 4 Upright rail assemblies
  • 4 Upright rail endcap
  • 2 Crossbars
  • 4 Crossbar endcaps
  • 4 Self-tapping screws (pre-installed)
  • Eight 10mm T-bolts
  • Eight 10mm washers
  • Eight 10mm nuts
  • 4 Crossbar strips
  • 8 C-clamp assemblies
  • Eight 10mm clamp bolts
  • Eight 10mm jam nuts
  • 8 Clamp head channel
  • 4 Slot cover
  • Change key
  • 4 Locking keys
  • 4 Load stops
  • 4 Knobs
  • 4 T-bolts
  • 4 Washers
  • Installation Instructions

Product Research

Features

Overview: The Thule 421-Xsporter medium-duty rack system designed to maximize the load capacity of select pickup trucks. The 421-Xsporter features long lasting, great looking high strength aluminum construction. The Thule medium-duty rack system can accommodate a load capacity of 450 lbs. The length of the cross bar is 71", while the height from the bed rail to the top of the cross bar is 25". You can raise the load bars to carry long loads or lower them for convenient bed level loading. The 421-Xsporter offers versatile aerodynamic load bars to accommodate Thule carriers. This Thule rack system features a locking system which includes four locks and one key. The 421-Xsporter rack system is easy to install with no drilling required.

Note: Excessive rust in truck bed decreases carrying capacity and could result in system failure. Vehicles with bed liners could require modifications.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Be the first to review this product
Great Gear Giveaway

Submit a review and then enter to win a $500 rewards card

Review this product:

Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

Your email won't be visible. Please use the email address that is associated with your order.
(e.g., JohnD) Your review will be signed using the display name and location
(e.g., Charlottesville, VA)

Click on a star to rate the overall product on a scale of 1-5
1500 characters left
  Attach a YouTube Review
Crutchfield Video Review Guidelines
  • Only submit videos that you made or are authorized to use.
  • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
  • Please see our Review Guidelines for more information.
500 characters left
500 characters left

Get everything you’ll need to enjoy your new Thule 421 Xsporter™ Rack System

Add a bike carrier to your rack system.
Get more cargo space in your vehicle with a cargo carrier.
Convert your bike rack to carry your watersport gear.
Thule 599XTR Big Mouth™ Bike Rack

Thule 599XTR Big Mouth™ Bike Rack

Single-bike roof carrier

Item #: 094599XTR

$169.99
Add to Cart
Thule 593 Wheel On™

Thule 593 Wheel On™

Single wheel carrier

Item #: 094593

$49.99
Add to Cart
Thule 232 Step-Up™ Wheel Step

Thule 232 Step-Up™ Wheel Step

Wheel-mounted step

Item #: 094232

$79.99
Add to Cart
Thule Force™ Cargo Carriers

Thule Force™ Cargo Carriers

Available in four sizes (Alpine)

Item #: 094623

(3)

$439.99
Add to Cart
Thule Sonic™ Cargo Carrier (Black)

Thule Sonic™ Cargo Carrier (Black)

Available in four sizes (XX Large)

Item #: 094636B

(1)

$719.99
Add to Cart
Thule 830 The Stacker™ Kayak Rack

Thule 830 The Stacker™ Kayak Rack

Roof-top carrier for up to four kayaks

Item #: 094830

(1)

$159.99
Add to Cart
Thule 881 Top Deck™ Kayak Carrier

Thule 881 Top Deck™ Kayak Carrier

Complete carrier for one kayak

Item #: 094881

$119.99
Add to Cart
Thule 834 Hull-a-Port Kayak Rack

Thule 834 Hull-a-Port Kayak Rack

Roof-top J-style carrier for one kayak

Item #: 094834

$149.99
Add to Cart
Thule 809 Double-Decker Surfboard Carrier

Thule 809 Double-Decker Surfboard Carrier

Mounting system fits most racks — includes locks

Item #: 094809

$239.99
Add to Cart