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Discussion Starter #1
I know this has been posted numerous times, but I'm thinking a sticky with what will work with the Speed6 would be helpful.

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Info to include:

Wheel size (diameter/width/offset/make/model)

Tire size and tire brand

Suspension (stock, aftermarket spring, make/model, etc)

Notes - fender roll, etc.

And having two areas would also be helpful - summer/winter.

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Just thinking, as I see a lot of posts asking these questions and this subforum seems to need some attention anyways.
 

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i care. +1

i have been asking for a speed6 specific tire/wheel area (since the speed6 gets unique wheels and rotors unavailable on other 6's) but the admins havent taken kindly to it
 

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Use the RX8 wheels ..it looks so factory. 18*8 50+ Offset...perfect!
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+1 and they can be had pretty cheap, they are lighter than our boat anchors and easier to keep clean. Also it gives the guys/gals in those pokey rx-8s a well needed ego boost. ;) JK
 

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buddy club spec II
18x8 45+ offset
235/35/18 toyo proxies

stock suspension
 

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Is lightening your wheel going to do anything performance wise if you don't lessen the diameter as well?
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Yes, especially as the weight is shifted toward the center of the wheel. Meaning, less weight in the rim reduces the work required to rotate the wheel to a greater degree than less weight in the hub. If memory serves, the moment of inertia is related to the square of the distance from the axis of rotation to the mass. This also means that of any two wheels of the same weight and distribution but different diamters, the smaller diameter one will require less energy to rotate. I used to know all this stuff in my college days, but all I remember was being absolutely amazed at how much energy it takes just to rotate the wheels and tires of a car at 60 m.p.h.

Mazda RX-8 6 Speed stock wheels
18 x 8
50mm off-set
Falken Azenis 235/40/18 RT-615 tires
Mazdaspeed Springs for V6 car
No Fender Roll
Absolutely no rubbing
Lovin' it.

http://forum.mazda6club.com/index.php?showtopic=60488
 

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Discussion Starter #9
Thanks for the info - keep it coming.

The RX-8 wheels people are speaking of; is it safe to assume that *all* Rx-8 models/years will fit?
 

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Thanks for the info - keep it coming.

The RX-8 wheels people are speaking of; is it safe to assume that *all* Rx-8 models/years will fit?
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Yes, all 18" RX-8 wheels will fit. You wouldn't want the 16" Auto trans wheels anyway.
 

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Just a bit of possible caution guys...

The RX8 wheels are much lighter but this may be because they are designed for a lighter car with half the torque.

I used to run a 2000 Audi RS4 (similar weight / torque to our beasties) and that had a problem with wheels bending at the inner rim if you were accelerating hard and went over a minor pothole. The torque of the engine exacerbated the problem because the shock impact was increased as the wheel 'climbed' out of the pothole.

It may be worth keeping an eye on things if you run RX8 wheels - it is hard to detect minor inner rim bending through steering feel alone. I used a length of wood with chamfered ends as a diameter gauge to check mine.

The problem was known to be reduced if tyres with stiff side walls were used - the accepted choice was the Michelin Pilot Sport 2.
 

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Just a bit of possible caution guys...

The RX8 wheels are much lighter but this may be because they are designed for a lighter car with half the torque.

I used to run a 2000 Audi RS4 (similar weight / torque to our beasties) and that had a problem with wheels bending at the inner rim if you were accelerating hard and went over a minor pothole. The torque of the engine exacerbated the problem because the shock impact was increased as the wheel 'climbed' out of the pothole.

It may be worth keeping an eye on things if you run RX8 wheels - it is hard to detect minor inner rim bending through steering feel alone. I used a length of wood with chamfered ends as a diameter gauge to check mine.

The problem was known to be reduced if tyres with stiff side walls were used - the accepted choice was the Michelin Pilot Sport 2.
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If it is a stock rx-8 wheel there is notheing to worry about at all. Mazda must make the wheel three times stronger then it needs to be to be sold in the US market. So the wheel is plenty srong for the Speed 6 and just about any car that the wheel will fit on (If the car is stock and not srechted out int a limo or some crap).
 

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Is anybody running 18x8.5? The wheel I really want seems to be available in a +48 but only in 8.5
 

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Discussion Starter #15
Is anybody running 18x8.5? The wheel I really want seems to be available in a +48 but only in 8.5
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No - I don't think that would fit - but there's only one way to find out.
 

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We already have a mebers wheel's thread, I'll add the stock speed6 info to the first post and to the section's FAQ. This however is not the right location for a post on wheels, and thus its being moved to the right place.
 

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im running 18x7.5 +43 offset with 225/40 18 tires. had to roll the fenders with the s.techs but with the autoexe springs i dont think it would be needed...
 
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