So what is the difference between the Ecopia EP422 Plus 4-rib or 5-rib? I understand their are 4 or 5 general ribs on the tread of the tire.
I am looking at them for out VW and it is tire size 195/65R15 and they come in both options. The 5 rib is listed as "Volkswagen" and it $5 more but is rated at 540 vs 640 for the 4 rib. Also the 5 rib is 51 psi vs 44 for the 4 rib, otherwise they are almost identical.