This Cycle rack gives you a secure and stable platform for your Bicycle. It's easy to install and handle and the Audi manual with detailed instructions is included in the box. Fully lockable and city crash tested. For bicycle frames up to 100 mm in diameter (oval frame 80 x 100 mm, round frame 20 x 80 mm). For bicycle wheels with a tyre width up to 63.5 mm.Please note while this item is universal and can be fitted to any model within the Audi range it can only be used with vehicle specific Audi genuine roof bars with a T-groove profile.Materials are aerodynamically formed aluminium profile with powder coated steel frame holder.