If you have a ifs with stock spindles and 4 inch drop springs in the rear. I would like to know what you run. I have a 51 and it ain't going to be long before i will need some rubber. I was thinking 255/60/15 cooper a/t.

 

On my 53 I am running 275/60R-15 rear and 225/75R-15 front.

 

On my 48 I'm running 225:75/R15s front and rear but will go with 235:75/R15s on rear next time. I have Volare front and 5-6 inch drop in rear with axle over springs...

 

Mine are the small ones.......

9.00-20 front and (duals) in the back!!

 

Size DOES matter

 

Yeah.... they're about 40" in diameter! With my 5.83:1 axle and OD trans, I expect about 2100 RPM at 60!!