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Discussion Starter #1
215/45ZR17 thats is a narrow tire! is it possible to get lexus GS400 17x8 rims (245/35ZR17) installed by dealer?
 

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The tire size on the GS400 is Not 245/35-17.... It's 235/45-17inch.....Those tires aren't that much wider than the ones on the IS and may be able to fit on the IS300 (given the proper wheel size (diameter/width).....
Eric.....
 

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Don't forget the offset and bolt pattern too...

Originally posted by EricK:
The tire size on the GS400 is Not 245/35-17.... It's 235/45-17inch.....Those tires aren't that much wider than the ones on the IS and may be able to fit on the IS300 (given the proper wheel size (diameter/width).....
Eric.....
 

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235/40/17 is the better match to the original size if you wanted wider tires. Just not sure what rim width the IS has...
 

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That's why I was asking what the rim width was... 235s on a 17x7 rim would be pushing it I think, while on a 17x8, should be perfect.

I'm running 215s on a 15x7 rim (on my miata) and it lines up nice, my brother runs 225s on a 15x6.5 (on his prelude) and they push out a little too much for my taste.
 

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Weird, they list the turning radius as 37.4 ft...
 

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Anyone know if 235/40-17's would fit on the 17x7 rims? I didn't see any info at Tire Rack that inidicated tire width limit based on wheel widths.
 

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If you want to increase the width on both tires I would do 225/45 17-inch in the front and 235/45 17-inch in the rear. High Performance RWD sport cars do this wider size in the back.

If you decide you want 18 inch rims on your car it is best to use the 1+1 method. 225/35 18-inch, 235/35 18-inch. It is pretty important to stay close to the diameter size of the tire the car comes with do to the ABS and brake rotors which might alter the performance and the cars handling. Usually, going with a super low-profile tire will give you a more uncomfortable ride feel.
 

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Discussion Starter #13
that car understeers enough so why would you make it do so even more? and if you put 235/35 on 17's you speedometer will be off about 3%
 

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Discussion Starter #15
hey doug that was in May when i was going to buy a lexus then i saw the the car which made me realize if i bought the is300 it would be like paying 35g's for a ford focus
******My s4 will smoke even a supercharged is300****
 

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No, I don't foresee changing to 18" rims or running different sizes front and back. I was just wondering if you can go wider and keep the same speedo calibrations (It looks like 245/40 is the closest match to stock).


[This message has been edited by marke1 (edited August 06, 2000).]
 
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