The TreeFrof PRO 1 bicycle carrier has a unique 7-shaped construction for maximum load bearing capacity. It fits one regular bicycle (up to 20 kg) but cannot be used with electric bikes. The double-layer polycarbonate board Pro 1 features 3 TreeFrog vacuum cups with a load capacity of 110 kg for each of them, 3 fork mounts and 3 rear wheel mounts. The 9-15x100 mm universal fork mounts can safely hold either one standard 9 mm quick release or a 15x100 mm fork(Boost spacer works with 15x110 mm mountain bikes). Different fork mount sizes are available for the Pro range - 12 mm, 15 mm, or 20 mm (including Lefty). It is a perfect choice for any car. It can even fit into a backpack, which makes travelling wit hit very easy. Travelling with bicycles has never been easier.