For some reason I thought 225 Rivals would fit properly on 15x9 6ULs... - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 02-04-2014, 04:51 PM   #21
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Dunno Curly, that statement sounds like a bit of a stretch...
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Old 02-04-2014, 05:08 PM   #22
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Tirerack lists the 225 Rival as having an 8.5" tread width. Tread width is what matters on radial tires, not what the sidewall looks like.

IDK about the rivals, but I'm pretty sure either Emilio or Sav have data that 225 RS3s are faster on 10s than 9s (for high-HP cars on a 2:00 lap at least I think that's what it was, don't feel like searching for it).
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Old 02-04-2014, 06:34 PM   #23
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Rule of thumb for performance use:

Wheel width should be the same as actual tread width or slightly wider.

I like the 1:1 idea. When anyone asks, just say 1:1

Last edited by emilio700; 02-06-2014 at 10:18 PM.
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Old 02-04-2014, 06:48 PM   #24
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Quote:
Originally Posted by thenuge26 View Post
Tirerack lists the 225 Rival as having an 8.5" tread width. Tread width is what matters on radial tires, not what the sidewall looks like.

IDK about the rivals, but I'm pretty sure either Emilio or Sav have data that 225 RS3s are faster on 10s than 9s (for high-HP cars on a 2:00 lap at least I think that's what it was, don't feel like searching for it).
I have seen data supporting 225's being faster than 205's posted by Sav or Emilio, but I think both were tested on an 8" wheel.
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Old 02-04-2014, 09:05 PM   #25
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Those look perfect. Ignore the rim width specs. Lawyers write them.
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Old 02-06-2014, 05:53 PM   #26
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205 on a 7<205 on a 8<225 on a 8<225 on a 9
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Old 02-06-2014, 05:56 PM   #27
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Looks sexy. and DAMN at that pic emillio, new desktop background right there.
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Old 02-06-2014, 06:55 PM   #28
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Quote:
Originally Posted by jacob300zx View Post
205 on a 7<205 on a 8<225 on a 8<225 on a 9
225 RA1s fit fine on 15x7s. Hell, I used to run 205 BFG R1s on a 14x5.5, although that was pushing it.

--Ian
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Old 02-06-2014, 10:19 PM   #29
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Quote:
Originally Posted by codrus View Post
225 RA1s fit fine on 15x7s. Hell, I used to run 205 BFG R1s on a 14x5.5, although that was pushing it.

--Ian
There was a guy at solo nationals that put 275/35/15 A6's on the factory 15x6 on the front of an Integra Type R in stock class. No, he didn't win.
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Old 02-06-2014, 10:25 PM   #30
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Quote:
Originally Posted by emilio700 View Post
There was a guy at solo nationals that put 275/35/15 A6's on the factory 15x6 on the front of an Integra Type R in stock class. No, he didn't win.
The usual theory I've heard for doing this is that while they're slower than 275s on a properly-sized rim, they're faster than 225s on on the rule-required rim size.

I have no idea if it's true or not.

--Ian
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Old 02-07-2014, 02:55 AM   #31
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Quote:
Originally Posted by emilio700 View Post
There was a guy at solo nationals that put 275/35/15 A6's on the factory 15x6 on the front of an Integra Type R in stock class. No, he didn't win.
This year G stock was won with a 2003 Celica 15X6.5 wheels 275 tires.
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Old 02-07-2014, 11:10 AM   #32
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Quote:
Originally Posted by codrus View Post
225 RA1s fit fine on 15x7s. Hell, I used to run 205 BFG R1s on a 14x5.5, although that was pushing it.

--Ian
Most 205 r comp or race tires want to be on an 8. Please don't be the guy that makes a class run late because he wants to talk about the exception not the rule. As pointed out you can run a 275 on a 5" rim, tons of grip but probably feels like ****.
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Old 02-07-2014, 11:22 AM   #33
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Such a Ricer.
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Old 04-01-2014, 02:30 PM   #34
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I don't see the problem... looks perfect to me.
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Old 04-01-2014, 07:19 PM   #35
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Quote:
Originally Posted by thenuge26 View Post
Tirerack lists the 225 Rival as having an 8.5" tread width. Tread width is what matters on radial tires, not what the sidewall looks like.

IDK about the rivals, but I'm pretty sure either Emilio or Sav have data that 225 RS3s are faster on 10s than 9s (for high-HP cars on a 2:00 lap at least I think that's what it was, don't feel like searching for it).
Could you link to the data on tens being faster?
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Old 04-01-2014, 07:24 PM   #36
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Quote:
Originally Posted by Nagase View Post
Could you link to the data on tens being faster?
I don't have any data like that. Maybe Andrew does
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