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How much time do you give up running 225s on a 8" wide rim instead of a 9"?
15 X 9" vs 15 X 8". What kind of time differences. Are there other reasons to run a 9" rim other than time? such as wear or how the car feels?
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ALL OF IT
No but seriously, can you get any more vague than that? If you're not trolling, go check out the 15x10 6UL thread, I'm pretty sure Sav and Emilio mention the difference between 15x9 vs 15x10 as well as 15x9 vs 15x8 I'm also certain we've had at least 2 other threads about this same topic in the wheel/tire section. |
225s on an 8 feel like ---- on the track with tire-flex, I'd rather run a 205 on that wheel, I'd probably be faster from comfort.
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If you are serious about tracking your car - go wider. If you just want to have fun once in a while - 8" will be just fine.
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Found it! You better ------- appreciate my work. This is what we mean by "search noob".
thread (post #33): https://www.miataturbo.net/wheels-ti...s-50923/page2/ post (refering to difference between 8" and 9" with 225/45):
Originally Posted by emilio700
(Post 676544)
Yup. Depends on the car and course but we usually see about a second on a 2 minute + road course, less on a shorter one. Autocross is less, maybe .4~.6 typically.
General rule of thumb (my rule): For maximum performance from radials, choose wheel width at least as wide as tire section width. Ignore bead width, tread width and manufacturers (lawyers) recommendations. |
I appreciate it! I could't find it, but I'm not a youngster like you!
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I had tried squeezing a set of 225-45 nitto's on a 7" set of spec miata rims (because that's what I had). The results were not optimal. I found that you had to start the tire out with much lower tire pressures as the middle of the tire would bulge when it gained air pressure and would overheat, making the car skate after 10 laps or so... next season, 9" rims, or 205-50 rubber.
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I never realized how much tires move around on the rim. I guess stretching the tire helps minimize this.
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The V8 Supercars series sometimes puts a camera on a front wheel. Amazing how much the contact patch distorts, especially under braking.
You get some good shots on F1 cars also, when they do the closeups / slo-mos of one going through a corner. The rears probably shift at least a half inch either way. |
I just ordered the 9" 6ULs. You guys have convinced me
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RS3's are in stock at the moment, too; got mine on Thursday.
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Originally Posted by tomiboy
(Post 911337)
I just ordered the 9" 6ULs. You guys have convinced me
Originally Posted by hustler
(Post 909409)
225s on an 8 feel like ---- on the track with tire-flex, I'd rather run a 205 on that wheel, I'd probably be faster from comfort.
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Originally Posted by Mobius
(Post 911446)
RS3's are in stock at the moment, too; got mine on Thursday.
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Originally Posted by curly
(Post 909503)
Found it! You better ------- appreciate my work. This is what we mean by "search noob".
thread (post #33): https://www.miataturbo.net/wheels-ti...s-50923/page2/ post (refering to difference between 8" and 9" with 225/45): |
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