I was looking to upgrade my standard 17's to 18's will I notice a difference in acceleration?

 

There will be a difference, but it's unlikely that you'll notice. In fact, if you upgrade to lightweight wheels you might actually see an improvement. Just make sure you choose your tires to closely match the OEM rolling diameter.

 

Any paticular brands to focus on that offer light weight wheels?

 

In general, forged wheels are your best bet for strong and lightweight. Specifically, Gram Lights, Weds and Volks come to mind. Strasse also has some interesting manufacturing techniques where they hollow out parts of the wheel to reduce weight.

 

Lastly any idea how much IS250 17' wheels weigh? Thanks for all the advice would be completely lost otherwise

 

Yep would be a difference.

Ride a bicycle with a set of size wheels, then change them with a different one, you would be able to feel a difference there. To a car, well not really but you know, if a car had feelings!! ha ha!

It's pretty much what brociouz mentioned.

Oh yes, Work wheels good too!

 

OEM wheels are engineered and tested for the car's performance, anything other the stock ones will affect the drivability.

 

Like ^ OEM steel wheels?

 

How about...what are you trying to achieve? Look better only? Be lighter? Or both?? Usually larger wheels that are lighter are quite expensive. I'd say finding out what your objective is the first thing you should do.

 

I've read that the stock 17" 10-spoke wheels weigh about 27 pounds, but don't quote me. I also read that the stock 18" wheels are about 28.25 lbs. in the front, 30 lbs. in the rear.

 

Bit of both really to be honest. 17's look lost in the lexus's massive arches.

 

As they say in the engineering community: Strong, Inexpensive, Lightweight. Pick two.

 

^

I'm trying to find that information out too because my new car - I am planning to get Work wheels in 18" retaining OEM spec or going 8.5" front and 9.5" rear and moving the offsets accordingly to retain OEM like offset but but want to know the the stock's existing weight to compare to.

 

I'd say go 19's and lower it.....done!




MAAAAAYYYBBBEEEEE!!

 

Won't increasing the diameter of the wheels throw off the odometer? Looking to get 19's while keeping stock sidewall height.