FWD INBD A B B A Transducer Outer wheel bearing Inflation valve Valve extension Hubcap fairing (outboard wheel only) Inboard wheel half Inboard wheel half Outboard wheel half O-ring O-ring Valve Bracket Extension Brake rotor key Plug Inside wheel half Outside wheel half Brake assembly Wheel balance weight Inner wheel bearing Axle Tire Camlocks (8 places) Wheel half tie bolts Heat shield Thermal plug Valve extension assembly Figure 13-59.  Features of a two piece aircraft wheel found on a modern airliner. 13-35 Wheel Construction actually contacts the wheel. It is the critical area that accepts  the significant tensile loads from the tire during landing. To  strengthen this area during manufacturing, the bead seat  area is typically rolled to prestress it with a compressive  stress load.  The typical modern two-piece aircraft wheel is cast or forged  from aluminum or magnesium alloy. The halves are bolted  together and contain a groove at the mating surface for an  o-ring, which seals the rim since most modern aircraft utilize  tubeless tires. The bead seat area of a wheel is where the tire 