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Old 02-01-2008, 04:06 AM   #1
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Stock rim width --

I'm finding conflicting results. Are the stock 18" Rims 8" or 7.5" wide? (07 if that matters...) Thanks in advance.
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Old 02-01-2008, 04:13 AM   #2
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18x8
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Old 02-01-2008, 04:45 AM   #3
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18x8
yup, 18x8's, a little research, you would of found it (not trying to give you a hard time, other people might... you know who you are out there! )
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Old 02-01-2008, 05:12 AM   #4
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Curious, where have you found someone stating 7.5?
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Old 02-01-2008, 06:23 AM   #5
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16 inch wheels are 7.5 inch width
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Old 02-01-2008, 11:26 AM   #6
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I was going by the tirerack. If you put in Mazda Rx-8, all of the wheel selections are 18x7.5 That's odd if they are 18x8, that's all...
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Old 02-01-2008, 09:37 PM   #7
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They do that because 7.5" wheels will technically work with the stock size tires. They just want you to have a broader selection because that means, to them at least, that you are more likely to find something you like.

It's marketing.
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Old 02-04-2008, 04:24 PM   #8
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Rim size

Straight from the Mazdaspeed brochure (I work in a Mazda dealer) - the Mazdaspeed wheels that are available in the US are 18x7.5 and are 17lbs a piece (They look similar to the T5 wheel on the Mazdaspeed Ver. 2 in Japan).

Why the difference from stock width I have no idea, it can not save that much weight.
I know the narrower the wheel better the snow performance....but who is going to drive the Mazdaspeed wheels in winter?
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Old 02-04-2008, 04:30 PM   #9
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all this time i thought it was 18x8.5

thanks for the clarification.
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Old 02-04-2008, 04:58 PM   #10
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I never realized the MS wheels were only 7.5. Intersting...
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Old 02-04-2008, 05:05 PM   #11
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something jedi doesnt noe... the force has not always been with him. :-P

Yea i was surprise to find that out too, like a year a go though. Basically that is the only thing that saves weight, too many spokes and forged magnesium cancel out the weight difference.
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Old 02-04-2008, 05:26 PM   #12
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Stock RX-8 Wheels are 18*8 or 16*7.5

ALL Mazdaspeed wheels specifically designed for the RX-8 are also 18*8. This includes the ones that are on the Mazdaspeed Ver.2 Concept car. To be fair you can get them for the Mazda 6 in 17*7 as well.

The only 18*7.5 wheels you will find from Mazdaspeed aren't even meant for the 8, but the 6. These were part of a special "mazdaspeed" package in canada that some of the dealers were putting on the 8s when they arrived nothing more. Those wheels are called the MS-T II and aren't the same as the ones on the Ver2 car.
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Old 02-04-2008, 09:13 PM   #13
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Ja, 17lbs and 7.5 no way.

I think Juice has clarified the mistake.
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Old 02-06-2008, 02:39 PM   #14
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Does anybody know the weight of the stock rims?
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Old 04-07-2008, 01:08 PM   #15
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Stock RX-8 Wheels are 18*8 or 16*7.5

ALL Mazdaspeed wheels specifically designed for the RX-8 are also 18*8. This includes the ones that are on the Mazdaspeed Ver.2 Concept car. To be fair you can get them for the Mazda 6 in 17*7 as well.

The only 18*7.5 wheels you will find from Mazdaspeed aren't even meant for the 8, but the 6. These were part of a special "mazdaspeed" package in canada that some of the dealers were putting on the 8s when they arrived nothing more. Those wheels are called the MS-T II and aren't the same as the ones on the Ver2 car.
What's the weight on the MS-T II rims that came with the "performance package" with the Canadian models? I've looked everywhere, can't find a price.
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Old 04-07-2008, 02:30 PM   #16
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I think you guys are all talking about the Mazdaspeed wheels made by Rays for the Speed3 and Speed6. They are 18x7.5 forged and weigh something like 16lbs. They are like $450 a piece.

Click the image to open in full size.
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Old 04-30-2008, 09:15 PM   #17
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What's stock rim offset?
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Old 04-30-2008, 10:59 PM   #18
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Stock offset for 18*8 is +50. I have no idea what the offset on the 16*7.5 rims is.
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Old 05-01-2008, 12:27 AM   #19
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Old 01-27-2013, 11:35 AM   #20
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So I bought 18x7.5 rims will the stock tires that come on the rx8 still fit those rims?
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Old 01-27-2013, 11:35 AM
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