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      05-18-2017, 01:29 AM   #23
Yves_0016
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Originally Posted by Mightymousemighty View Post

I would go with the Pirellis for the coloured side wall...sad I know. Looking at the website I dont see an i8 option?
Same here...
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      05-18-2017, 09:03 AM   #24
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Quote:
Originally Posted by Mightymousemighty View Post

I would go with the Pirellis for the coloured side wall...sad I know. Looking at the website I dont see an i8 option?
Same here...
+2. With silver or preferably blue lettering.
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      05-19-2017, 09:43 AM   #25
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Interesting point

It would be interesting to know what the wheel width limit is for that.

I am pretty sure that BMW used skinny tyres for fuel economy alone though.
They certainly did use thinner tires for reduced rolling resistance (fuel economy benefit). That efficiency also aids in performance. However, the air curtain effect is compromised, if the width of the tires intrudes the air flow around the car. From the front of the car, there are slits in the front fascia that direct air around the car. This is part of what aids in getting the .26 drag coefficient.

The real question is......how much would a driver detect in the difference of the aero at that point? At normal (speed limit) speeds, probably none at all. At high speeds, it may be much more detectable.

No expert here. Just stating what the engineers were attempting to accomplish with the car.

That said.....if you ever plan on autocrossing your i8 or any other type of racing where constant stopping and starting is required, DEFINITELY change the size of the wheels.


Last edited by jnkirk1974; 05-19-2017 at 12:36 PM..
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      05-22-2017, 07:53 PM   #26
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Serious question - in that case why not stick with the standard Bridgestones?
Because they don't last.
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      05-22-2017, 08:21 PM   #27
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Serious question - in that case why not stick with the standard Bridgestones?
They do not last.
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      05-23-2017, 10:12 AM   #28
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Originally Posted by jnkirk1974 View Post
They certainly did use thinner tires for reduced rolling resistance (fuel economy benefit). That efficiency also aids in performance. However, the air curtain effect is compromised, if the width of the tires intrudes the air flow around the car. From the front of the car, there are slits in the front fascia that direct air around the car. This is part of what aids in getting the .26 drag coefficient.

The real question is......how much would a driver detect in the difference of the aero at that point? At normal (speed limit) speeds, probably none at all. At high speeds, it may be much more detectable.

No expert here. Just stating what the engineers were attempting to accomplish with the car.

That said.....if you ever plan on autocrossing your i8 or any other type of racing where constant stopping and starting is required, DEFINITELY change the size of the wheels.


What...... some of you guys just crack me up with your comments, but to hey what ever makes you happy..
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      05-23-2017, 06:04 PM   #29
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What...... some of you guys just crack me up with your comments, but to hey what ever makes you happy..
Glad I could crack you up.
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      05-24-2017, 01:35 PM   #30
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Glad I could crack you up.
FYI I didnt mean it in a bad way... it was just funny
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      03-19-2020, 12:22 AM   #31
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anyone really seen difference between the bridgestone potenza s001 and the s04 pole position P245/40R20? Curious why they are very similar but cost is considerably different. Both claim summer only, but my s001 can take off on slightly wet payment even at 40 degrees and not spin full throttle. Curious how the s04 do?
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