Originally Posted by liljohn1064

I think it's just where the backspacing ends. If you use Jacos, you'll have to add shims to get it back out to 235mm. The car would have been at 241mm with BSRs on the original pod without narrowing. 3mm too wide on each side. You'd have had to manually narrow the rim and tire from the outside edge using a lathe without the pod redesign. Much easier to shim out hub spacing once than narrow down every set of rims!