When you think of 6 wheeled Formula 1 cars the Tyrell P34 always comes to mind, with its iconic 4 up front wheel configuration. However a few other manufacturers had a go, but not with the front, but the rear wheels, here’s some pictures and links to a few, unfortunately the regulations in 1983 took all the fun out of it banning 4 wheel drive and soon after 6 wheeled cars-
1977 Ferrari 312T6-
1982 Williams FW08-6W-
1977 March 1-2-4-
Unfortunately with the exception of the Tyrell the other cars seem to only have been prototypes and run only a few times as a result information on them is sketchy. They do however allow you to hark back to a time when motorsport was all about trying something outrageous and innovitive to push the boundaries of the sport, its a shame the regulations don't allow this any more.