Bicycle wheel rims meant for use with disc brakes or hub brakes sometimes lack this surface. The Westwood pattern rim was one of the first rim designs, and rod-actuated brakes, which press against the inside surface of the rim were designed for this rim. These rims cannot be used with caliper rim brakes. The cross-section of a rim can have a wide range of geometry, each optimized for particular performance goals. Aerodynamics, mass and inertia, stiffness, durability, tubeless tire compatibility, brake compatibility, and cost are all considerations. If the part of the cross-section of the rim is hollow where the spokes attached,
Fuchs wheel the hub and the rim for reasons of style and appearance. While our design was well-adapted to the shape of the series vehicles now being retired, the shape developed by Mr. Porsche Jr. appears more harmonious with the new vehicle". Ferdinand Porsche Jr based this design change off a 'kleeblatt', or four leaf clover. Fuchsfelge AG was responsible for many technological advancements in the creation of automotive wheels around the late 1960s and early 1970s; notably the creation of the first forged wheel on behalf of Porsche, and the first series-production aluminium wheel, which was used on the 1972 Mercedes