Roof bike rack

Thule Prologue

Transport your bicycle quickly and safely with this lockable fork-mounted bike rack. *Not compatible with Thule Aeroblade bars.



  • Locks the bike to the bike rack and the bike rack to the roof racks with Thule One-Key lock cylinder (sold separately)
  • Easy-to-use stainless-steel skewer with oversized lever makes for secure loading and unloading
  • High-strength nylon composite head
  • Corrosion-resistant aluminum tray to withstand the elements
  • Versatile design compatible with standard 9mm axles and most disc brakes
  • Carries bikes with wheelbases up to 48" and tire widths up to 2.6"
  • Secure the rear wheel quickly with the durable wheel strap. Even works with high profile rims
  • Fits Thule square bars and round bars
  • Factory rack compatible with Thule Ride-On Adapter (sold separately)

Technical specifications

Load capacity 15.9 kg
Dimensions 131 x 22 x 10 cm
Weight 2.3 kg
Fits round frame dimensions All
Thru-axle compatible Adapter/s required
Carbon frame compatible
Fits roof racks with 20x20 mm T-tracks
Fits roof racks with 24x30 mm T-tracks
Fits SquareBar
One Key System compatible
Model number 516XT
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


Do not buy this rack!


The skewer assembly IMHO is a flawed design, and here's why. The assembly is held together by a rivet that travels through the plastic cams and through an internal arm that tightens the fork clamps when actuated. The problem is that the rivet bends/loosens, resulting in 3 issues: 1) Once bent, the skewer fails to apply pressure to hold your fork, 2) The rivet can fall out of the assembly. The assembly will then come apart. 3) Once bent the rivet can cause the cams to flare outward, resulting in failure to engage with the aluminum facing, resulting in failure to put pressure on your fork. Thule will probably tell you this is user error, e.g. too much torque, a point that I would argue. I have been using Thule products for over 30 years with no issues such as this. I have 4 of these, and they are all doing the same thing, and they cost $45 to replace (each)! Thule, why not use a stronger/thicker bolt that is easy to replace instead of this rivet? Over the years I have spent quite a bit of cash replacing all of the cheap plastic parts that come with Thule racks. I don't have a problem with maintenance, but this product is just poorly designed and consequently rendered useless, just because of a cheap rivet.

Nick Ponte

Waterbury, CT




Nice design and look, works great and it's very easy to install too. I'm very happy with this Thule bike carrier.


Ridgefield, CT


Thule Prologue

3.0 2


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