Will 30/9.5/15s cause any noticeable mpg or power loss?
 

Thanks. Coming from 235/70/15. 98 2 door 4x4

Yeah i did..maybe about 0.5 mpg to 1mpg. I went to nexen street tires 235/75/15 , to discoverer rtx (at's) 235/75/15, to road one aetheon (mts) 30x9.5x15. They were cheap and have been great around 800 for all 5 mounted and rotated. As well in the since of power...blazer was slow..still is slow
https://cimg3.ibsrv.net/gimg/blazerf...ec68ec84fd.jpg
https://cimg9.ibsrv.net/gimg/blazerf...de3c35efa7.jpg

yeah i dont care too much about the mpg as long as its not a big change. haha blazers are slow anyway so i think maybe i should just get the bigger tires

I think it is a reasonable change