New to the forum, acquired my 1999 caterham series 3, last summer. Car is an HPC car, Vauxhall 2.0, updated cams, Weber carbs, 6 speed, limited slip differential, has uprated front and rear springs, bigger front bar and adjustable rear bar. Have owned and raced a 1971 Datsun 510 for more than 30 years. I have always used the Hoosier A6 or A7 tires. Previous owner did autocoss the car(10 years ago)and used bogart wheels, 13x10 with Hoosier R25 slicks. Going over various posts the common tire appears to be the Hoosier bias ply slick in the softest compound. What are people's thoughts on the A7 in the 255/40-13 on a 9" wheels vs either 20.9x9/13 or the 22.5x10/13 bias slicks on 10" wheels? Is there a reason the dot radials don't appear to be the tire of choice?
thanks