Description: Support arms are made of high-strength aluminium tubing. The system is easy to fit- with no tools required. Maximum roof load up to 200 pounds. The base support system with antitheft locks complies with the most stringent safety requirements. BMWs modular roof rack system with coded bolts offers security and practicality. Made of high-tensile aluminum tubing- it is remarkably lightweight- strong and corrosion-resistant. Easy to install and is compatible with a wide range of aerodynamic attachments.