I juat bought 19x 8 19x9.5 what tire size do i need? Also wud i have to get rear genders rolled? What someone told me

 

you're going to have to do some research

it depends what you want, meaty set up, stance/stretched? plenty of different tire options. how low are you? whats the offset? would determine if you need a roll

look in the gallery at fitmentindustries.com to reference other Gs and their set ups.
also check out tyrestretch.com for what different tire sizes would look like
lastly on willtheyfit.com you will be able to put in your current specs vs your wanted specs to see how much of a difference there will be. Then use that data to measure your wheels and wheel wells. A lot goes into buying wheels and tires if you want to do it right the first time

i have 18x9.5 18x10.5 +25 wheels coming in. Going to get 235/40R18 245/40R18 as of right now for tires. about a 2inch drop on BC coilovers (slight roll all around, no pull). I measured everything referencing the willtheyfit site and i believe itll be exactly what i envisioned when they are finally mounted.

Like i said, you have a lot of research to do, gl