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<blockquote data-quote="BlackBolt9" data-source="post: 3990464" data-attributes="member: 36489"><p>[QUOTE='03 Sonic Blue]Thanks for the info.</p><p></p><p>The 99 Miata Sport came with 15 inch wheels. The availability of race tires in that diameter is much better than for the narrow 17 inch wheel of the 04 Mazdaspeed Miata and for stock class, you can't change wheel size. I don't know if they built enough of them to entice the tire companies to offer some AX tires in a suitable size in the future. Maybe if the Mazdaspeed Miata can kick some butt at Nationals this year is CS they'll recognize it as a market to go after.</p><p></p><p>I'm going to call Hoosier to see if they know whether the new 225/40-17 will clear the sheet metal on the Miata. Based on thier specs, it should have over 3/8 inch more clearance at the edge of the tread face than the 225/45-17.</p><p></p><p>I really hate the idea of going back to a street tire on this car. Especially when the guys I'm competing against for Regional Solo points are running V710s and A6s:cuss: </p><p></p><p>--Mike</p></blockquote><p></p><p>225/45-17 is about 24.97" Diameter</p><p>225/40-17 is about 24.09" Diameter</p><p></p><p>So with almost an 1" less overall that should give you about 0.5" more clearance on the diameter, lower the car (center of gravity) 0.5" and lower the gearing too for more acceleration although you will run higher RPM's to get the same speed.</p><p></p><p>Granted I don't know how noticable that would be but according to the engineering principles it works out that way LOL.</p><p>[/QUOTE]</p>
[QUOTE="BlackBolt9, post: 3990464, member: 36489"] [QUOTE='03 Sonic Blue]Thanks for the info. The 99 Miata Sport came with 15 inch wheels. The availability of race tires in that diameter is much better than for the narrow 17 inch wheel of the 04 Mazdaspeed Miata and for stock class, you can't change wheel size. I don't know if they built enough of them to entice the tire companies to offer some AX tires in a suitable size in the future. Maybe if the Mazdaspeed Miata can kick some butt at Nationals this year is CS they'll recognize it as a market to go after. I'm going to call Hoosier to see if they know whether the new 225/40-17 will clear the sheet metal on the Miata. Based on thier specs, it should have over 3/8 inch more clearance at the edge of the tread face than the 225/45-17. I really hate the idea of going back to a street tire on this car. Especially when the guys I'm competing against for Regional Solo points are running V710s and A6s:cuss: --Mike[/QUOTE] 225/45-17 is about 24.97" Diameter 225/40-17 is about 24.09" Diameter So with almost an 1" less overall that should give you about 0.5" more clearance on the diameter, lower the car (center of gravity) 0.5" and lower the gearing too for more acceleration although you will run higher RPM's to get the same speed. Granted I don't know how noticable that would be but according to the engineering principles it works out that way LOL. [/QUOTE]
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