Offset Help Needed Please!

[buppers]

hi guy's could i get a little help with this problem.

found a nice set of used wheels with tyres

fronts are 17x8JJ/30 235 40 17

Back are 17x9jj/35 255 40 17

i beleive oem 17" wheels are something like f 45 and r 50 offset

ive got an is250, any issues with these, will i need spacers if so what size and wheres the best place to get a good set from, also wheels come with tyres but are 40 profile not 45 as on oem does this matter as its only slighter smaller.

i need reply asap please as i have to let the guy selling know soon to arrange collection

thank you

shu

ps. ive posted this same question on the uk site

[xxstewart]

Most any performance tire dealer can tell you if the tires will fit. If you need spacers, try Spidertrax (www.spidertrax.com).