1977-02-01

Evolution of the Trailer Air Brake System Under the Effect of FMVSS 121 770661

The air brake system on trailers has undergone many changes since 1974. Changes are not over as market pressure has kept manufacturers of both systems and vehicles searching for more cost effective means. Changes after 1977 will be at a considerably slower pace than those that have occured since 1975.

SAE MOBILUS

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