Need Info

[Freddy Vernon]

I have a 08 STA with 20" rims and 255-50-20 tires. If I move up to 22" rims what size tires do I need to keep the same diameter so the speed ometer is not messed up. And how will if affect the gas millage with the bigger rims and tires??? Need info asap. Thanks

 

[Jacob Dryer]

255/40/22 - equal

245/40/22 - 1.1% too fast

265/40/22 - 1% too slow