He is refuring to the tire size vs. gear ratio & the power of the engine that would be better as a performance vehicle rather than a everyday street truck that has balls.
The engine produces power in a curve, the stall converter plays a roll, the trans has gears that get it moving and the rear ratio & tire size are the final outlet of the power. Each part mentioned above can be tailored for street, Hwy. Race, road rally, grand ma's shopping car.
