how well would this work? would it stretch the side walls too much. if i do get rims in the future, id like to use my almost new 245's i bought for my stockers.

 

they will work but it looks lame as hell. small tires on big rims looks rediculous.

 

would 255/40s work or should i just get the 275's?

 

255 is a minimal difference from 245. if you are going to spend the money anyways, pitch in 20 more bucks and make it look right. your selection is also greater with 275 series tires.

 

yeah i wouldnt do it either...i kinda had to since the 245's on my stockers were new aswell..but if i had the money to do it again i would of gone with a 275...check this pic...17x9 w/245's..it doesnt look all that bad, but it will get to you, well to me atleast,lol