i am going to lease a GS300 or GS430 . I want to know if I put 20's on them will the acceleration slow down a lot and will the ride be real bumpy. Please, someone who has 20's on lex, let me know . Thanks Mike

The diameter of your wheels makes no difference at all to the acceleration figures - it only affects what the speedo reads if you haven't reduced the profile of the tyres accordingly that you put on them.

The extra weight can make a difference but not that much.

You may want to post your question on the US forums as there are more people running GSs with 20" wheels there.

http://us.lexusownersclub.com/forums/

The added weight will slow down the acceleration and lengthen the braking distance. By how much depends on the wheel/tire combo weight.
The bumpy ride will also be affected by weight.

why worrie about speed when you will have to go slow so ya can pimp the lex so every one can see it might as well get 16'ns if ya gona speed by them lol

This guy has a point.

well its true i thought why spend what upto 2k on 20's or some thing like that when peeps wont see em lol when i have me 19'ns on ill be going slow just to show em off bling bling !

I've got 19's on my '99 300 and all that happened was the cornering improved!

Go for it

Dave
L33EXY

(Mille Miglia Actions with TOYO shoes)

why is there a presumption that there will be added weight
there are some extremley lightweight wheels available
and they would have less tyre on them

if the circumferance of a wheel is larger
the distance travelled by one revolution would be more !
so in theory it would go faster
and have less tyre wear

you cannot go changing the circumferance of the wheel otherwise your odometer and speedo will be out.

Magnesium wheels no matter how big would be very light. But fragile.

We put 19s on our old CLK. it mad no difference except to our bank balance... and the kerbs still jumped out at her everytime she parked on the high street...

LOL!