Who started the process of designing the Tumbler
The basic configuration of the newly designed Tumbler included a 5.7 - liter Chevy V8 engine , a truck axle for the rear axle , front tires by Hoosier ( which are actually dirt racing tires used on the right rear of open wheel sprint cars ) , 4 rear 44/18.5-16.5 Interco Super Swamper TSL tires ( 44 " tall , 18.5 " wide , mounted on a 16.5 " wheel ) and the suspension system of Baja racing trucks .