kanklez

for those of you is250 owners with lightweight rims (i.e. weds), do you notice a difference in acceleration and overall feel of the car from the stock 18s?

This is only pertaining to the is250 since it's slow as it is...

johnchi

I have enkei PF01 wheels - 18X9 and 18X9.5 (clear IS-F brakes I have )
wheels are approx 4-5 LB lighter than stock depending fr or rr corner and the difference is noticeable when I track my IS and the change was a blessed one.
You can feel the difference just driving around town but you need to really concentrate to notice it.

APynckel

On my eclipse gsx, I can definitely tell you that I tell a difference in cornering and acceleration when I upgrade to lighter wheels.

SB350

iTrader: (1)

I have weds sa55m on my IS350, which are much lighter than my stock wheels, and I could not physically "feel" any difference in acceleration over the stock wheels. On paper, it might show slightly better performance numbers and mpg though.

kanklez

For the 350 owners you guys are lucky. Since I've got the 250, IMO I think it's extremely slow on the acceleration side.

So cornering it helps, but what are your guys take on acceleration? Any noticeable difference on the butt dyno?

CleverName

I have the Ultraleggeras on my 350 and at 17.5lbs each the feel is very noticeable. Acceleration is not the big gain here and doubt I can see any real diff in that area myself (as others have said, it may show in numbers under close scrutiny but it is not moving the needle on my butt dyno).
Handling and responsiveness to road undulations is however a big gain, and one that puts a smile on my face as I dash through twisty mountain roads. Ride comfort is up as well.

Keep in mind that your talking unsprung weight, which also includes the weight of the tire you choose to mount up on your rims... With my RE11s I come in at 40lbs per tire/rim combo.

Vince

JDKane527

iTrader: (10)

I have Weds SA-67s on my 250(~8-10lbs lighter per corner), change in acceleration was not noticeable, but handling wise, the lighter wheels made the ride comfort increase noticeably. Canyoning is way more fun.

2slixx

iTrader: (3)

I don't think rim weight help as much as tire type when it comes to accelerating... Just my take.