Ability to Decrease Rim Size to Increase Tire Sidewall Size

Can we have the ability to decrease the rim sizes as well? Currently We can just increase rim size, which decreases the tire sidewall size. This would be great for converting street cars to off-road cars or rally cars.

A lot of times when I want to convert a street car to an off-road or rally car, like a Subaru or something, I’ll slap some rally or off-road tires on it, pick out some cool rally rims, but then I’m stuck with these itty bitty tires. If we could decrease the rim size from the stock size, we could increase the sidewall size. This could then maybe decrease handing, but increase the offroad stat. Otherwise I’ll be bustin’ my brand new rims on any little rock I come across.