After much research and browsing on this site,I ordered my 2015 IS350 AWD F Sport today. Ultra white/Rioja interior. I'll have to wait 3 months or so,but heck,winter will be long gone by then. I plan on lowering the car(not right away) and have seen plenty of talk about springs and forgive me for asking what so many others have asked,which ones? My wheel setup will be 19x8.5(235-35), and 19x9.5(265-30) with the offset of +35 in front and +40 in back. I want to make sure that I have NO chance of rubbing. Thanks for any info on this subject. Can't wait to "belong" here.

BTW I also got the F Sport exhaust and intake along with the lighted sill plates

 

damn you and your heated steering wheel.

JK, congrats on the IS you're going to love it

 

That's a good choice of wheels & tire your on the right path..
You will not get any rubbing in the front..
The rear I would use a 255/30 to be on the safe side for not rubbing..

Congrats..

 

wouldn't rubbing depend also on your road? if your city road sucks you'd rub regardless? cause god houston road sucks

 

Thats a beautiful color combo! Lets see some pictures of her!

 

Best color combo! congrats!

 

Good choice on the colors. You will love it when it arrives.

 

Pairing a 235/35 with a 255/30 on an AWD car like he has would have you running a half inch different diameter tires. For the health of the differential I would either pick a less aggressive offset and do the 235/35 and 265/30 combo or do a 225/35 and 255/30 combo.

OP, awesome car combination you ordered. Just to point out there is also the option that since your car is AWD if you wanted to actually improve handling you could do a square 245 or 255 setup since this car understeers like pig

For springs the ones with nice F to R rates are the RSR down springs. I wouldnt go any lower than that on stock shocks or you severely reduce suspension travel and it will handle like crap. If you want a mild drop there are Htechs and Half Downs but most people on this board like their cars to look more "dumped" so the RSR downs are lower.

Mike

 

Wouldn't 255 be stretching on a 9.5 rim?

 

What would a better offset be? +45 maybe?

 

Yes, sir! That will be a stretched look. 265 or 275 is a better choice. It all depends on the offset and how low the car will sit

 

BTW, congrats on your purchase. You won't be disappointed when that car arrives!

 

Curious to know why you would want to lower and AWD car, especially in a northern climate?

 

I have an Acura TL and have had it lowered for 10 years and drive it year round without any problems. I know it's a front wheel drive, why the concern if it's awd?

 

No concern, just thinking that people who buy the AWD (like me) want it because they want the additional traction in bad conditions and where they live. Having a lowered vehicle, I would think, would present more of a problem with snow ridges, pot holes, frost heaves, etc. Maybe the roads are kept in better condition where you are than me. Sounds like you made out ok with the Acura, so your Lexus should not present anymore of a problem.