Rim Size (Benefits)

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03-16-07, 03:11 PM

#16

kickin8

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Quote:

Originally Posted by is4fsr

Bigger brakes are for performance(stopping capability). Compare the brake size (rotor size) of is250 vs is350. Just what most of you claim bigger wheels are only visual effects and has nothing to do with performance. Bigger wheels are heavier.

not necessary ? back in the dayz:

cast iron rims vs alloy wheels : alloy wheels are definitely better than the ugly black ones!

alloy vs alloy: then bigger wheels are heavier.

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03-16-07, 03:55 PM

#17

ldc

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Quote:

Originally Posted by kickin8

that means you'll have a higher chance to pick up a nail in your tire....

I don't see the correlations, but i know what you mean. Wider tyres arguably do attract nails more than skinny ones but yeh ...

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03-16-07, 04:02 PM

#18

Burst32

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Quote:

Originally Posted by SATSONGWIT

My 06 IS250 RWD has stock 205/55/16 tires & wheels. Changing to 20' inch wheels will increase the tire OD by 6%. I have been warned that this could cause brake failure and/or problems with the stability control system. Is this a confirmed problem? How have others compensated for this problem?

how did you get 16" wheels??

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03-16-07, 06:17 PM

#19

caudlek

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Quote:

Originally Posted by is4fsr

... brake size (rotor size) of is250 vs is350. ....

Actually .... what are the differences in brakes between both the 250 and 350 ... I've read this several times in this forum but don't really know the actual differences ..... who knows?

KC

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03-16-07, 09:50 PM

#20

SATSONGWIT

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Quote:

Originally Posted by Burst32

how did you get 16" wheels??

In Canada, IS250 RWD stock wheels are 205/55/16. I just thought this was normal everywhere?

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03-17-07, 01:04 AM

#21

lobuxracer

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Quote:

Originally Posted by caudlek

Actually .... what are the differences in brakes between both the 250 and 350 ... I've read this several times in this forum but don't really know the actual differences ..... who knows?

KC

Rotor diameter and ventilation style are different. Front calipers are fixed with four pistons, not floating with one. Rears on both float. See below:

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03-17-07, 10:02 PM

#22

is4fsr

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Thanx lobuxracer for covering that topic. Just got off work and saw the question.

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03-17-07, 11:58 PM

#23

caudlek

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Quote:

Originally Posted by lobuxracer

Rotor diameter and ventilation style are different. Front calipers are fixed with four pistons, not floating with one. Rears on both float......

Thanks. I was wondering if the 250 had 4 piston fronts as well .... not the case i see.

One of the things that sold me on the 1st Gen IS was a Road&Track (??) article where the writer stated that, in their testing, the IS out braked every Ferrari they had ever tested save for one. I was wondering if the 2nd Gen was as good?

KC

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03-29-07, 01:49 PM

#24

RocketGuy3

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Sorry for the bump, but I just want to see if I can get a little clarification...

So if you have two wheels - one 18" and one 19" - that are both the same weight, and the same width and everything... There is absolutely NO performance advantage for the 19" wheels over the 18" wheels?