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Roof bike rack

Thule Circuit

Low-profile fork-mount bike rack for security, convenience, and aerodynamic styling.



  • Easy to secure the bike to the carrier with the locking skewer (lock and cylinder sold separately)
  • Fast loading and security provided by lockable skewer with same-side adjustment dial (locks sold separately)
  • Versatile design compatible with standard 9mm axles and most disc brakes
  • Easy to install with universal tool-free mounting
  • Integrated wheel cradle high-wall design provides protection and perfect fit beneath your wheel
  • Low-profile aluminum tray made from corrosion-resistant aluminum to withstand the elements
  • Secure the rear wheel quickly with the ratcheting wheel strap
  • Locks the bike to the bike rack and the bike rack to the roof racks with Thule One-Key lock cylinder (sold separately)
  • Fits Thule rack systems, round bars, and most factory racks with around the bar tool-free mounting

Technical specifications

Load capacity 35 lb
Dimensions 55 x 8.6 x 5.25 in
Weight 6.1 lb
Fits round frame dimensions All
Thru-axle compatible  ✓  Adapter/s required
Carbon fork dropout compatible  ✓ 
Fits roof racks with 20x20 mm T-tracks  ✖ 
Fits roof racks with 24x30 mm T-tracks  ✖ 
Fits Thule WingBar Evo  ✓ 
Fits Thule AeroBlade  ✓ 
Fits Thule SquareBar  ✓ 
Fits Thule ProBar  ✓ 
Fits Thule TracRac - Truck  ✖ 
Fits Thule TracRac - Van  ✓ 
One Key System compatible  ✓ 
Model number 526XT
Spare parts



Thule BringIt! GuaranteeThule is dedicated to providing exceptional products that are quality tested and guaranteed against defects in materials and workmanship.

View warranty details

Accessories for


Clumsy design


Once the bike is on the rack, it works fine. I switch between kayak and bike racks regularly, and this bike rack is a pain to put on and tack off. You have to push the retaining lug (hard to do), remove a small locking cap and the retaining lug, slide the clamp out, make sure you don't lose the two very small parts, then you can proceed to unmount the bike rack. Second, the locking mechanism sticks pretty out from the side, creating an unattractive appearance. Third, if the clamp is adjusted for your bike, if the bike is not on the rack, the clamp flops around. If you tighten the clamp to prevent it from flopping, you need to tediously readjust for the bike fork while you're holding the bike up on the rack. It is a lot easier to adjust than the knurled thumb wheel inside my older Thule rack. On the plus side, the rear tire hold down clamp is easy to use.



Not secure


Don't walk away from your vehicle with your bike on rack, very easy to defeat lock mechanism.


Portland, Oregon


A little disappointing


I shall use this when we want to transport both bikes. The set up was fairly easy, and the instructions were clear. My only issue is with the fork skewer. Due to the way it's made, you can't install it and leave it on the rack. The end cap isn't tight and would just fall off, so I'll need to keep it in the car, and install when needed.

Jack on Mac

Wauconda, IL


Thule Circuit

3.3 7