The six-wheeled 312T6 used four tyres at the rear, specially developed for the purpose.
It was one of a few six-wheeled designs during that period, although Tyrrell's P34 was
the only example which raced. The car followed in the footsteps of the Tyrrell P34,
but instead of four smaller front wheels, the T6 used 4 normal sized rear wheels on one rear axle.
The car was tested by both Niki Lauda and Carlos Reutemann in 1977, but it never raced.
Quite apart from the fact that it was far wider than the regulations permitted it also proved a
challenge to drive. During one test session at Ferrari's Fiorano test track, Carlos Reutemann,
on the 12th lap, crashed the car, which then burst into flames. On another occasion,
it suffered a rear upright failure.
Reutemann was not impressed with the 312T6.