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<blockquote data-quote="'03 Sonic Blue" data-source="post: 3990964" data-attributes="member: 8510"><p>The Mazdaspeed would benefit from taller gears. The factory wheel size, (diameter of 23.5), results in top end speeds of 29 in 1st gear, 49 in second gear. Based on Hoosier's published diameters for those tires: 24.5 and 23.9 respectively. The 225/40 would raise 1st gear to 30 and second to 50. The 225/45 brings it to 31 in first and 51 in second. </p><p></p><p>Overriding all other issues is tire clearance.</p><p></p><p>--Mike</p></blockquote><p></p>
[QUOTE="'03 Sonic Blue, post: 3990964, member: 8510"] The Mazdaspeed would benefit from taller gears. The factory wheel size, (diameter of 23.5), results in top end speeds of 29 in 1st gear, 49 in second gear. Based on Hoosier's published diameters for those tires: 24.5 and 23.9 respectively. The 225/40 would raise 1st gear to 30 and second to 50. The 225/45 brings it to 31 in first and 51 in second. Overriding all other issues is tire clearance. --Mike [/QUOTE]
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