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SVT Shelby GT500
HELP!! TREAD width vs SECTION width on Cup 2s
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<blockquote data-quote="Dinosgt" data-source="post: 15521707" data-attributes="member: 169099"><p>Folks:</p><p></p><p>I have a very perplexing problem with some Michelin Cup 2s. I had a set of forged Rotiform wheels made for my car (20 x 9.5 FR and 20X11 RR), with a rear offset of 55 mm. My desire was to also try the Cup 2s, and the “engineers” speced out a 305/30/20 to go on the rear. Ergo – my problem:</p><p></p><p>Once installed, and the car on the ground, the tire stick out of the fenders about 4 mm (FWIW the rear is centered with the panhard). I don’t want the tires to stick out of the fender, and more so, no rubbing or other interference. </p><p></p><p>Taking a closer look at the tire spec - The tread pattern on the 305 N01 Porsche tire that I have is 12.2 inches on a 12.3 inch section width. So - its very “square” in its profile. Interestingly, the Cup 2s also come in three “305/30” sizes with differing TREAD widths. They are:</p><p></p><ul> <li data-xf-list-type="ul">The Audi tire at 11.2” TREAD WIDTH</li> <li data-xf-list-type="ul">The Ferrari tire at 11.7” TREAD WIDTH</li> <li data-xf-list-type="ul">The Porsche tire at 12.1 TREAD WIDTH</li> </ul><p></p><p><u>Again - They ALL have the same section width of 12.3”. </u>So it seemed obvious to me that I should just spec the Audi tire with the 11.2 inch TREAD Width and get the tire inside the fender.</p><p></p><p><u>HOWEVER, since they all have the same section width </u>at 12.3”, will it really come inside the fender? I also looked at the 295/30 size, with a section width of 11.9” and a TREAD of 11”, but I am afraid it will look like a rubber band on the rear. (Its only 27 inches tall, vs the 285/35 on the car originally at 27.9”). </p><p></p><p>Most frustratingly, my tire guy has been useless (i.e. no help), I called Michelin directly and got nothing; Talked to Tire Rack and Discount tire, and basically got no help either. </p><p></p><p>My question is simple, does the profile of a tire with a 11.2 inch tread have different “look” than one with a 12.1 inch TREAD? I.e. is it more “rounded” than the 12.1 inch tread? </p><p></p><p>I can’t find anyone that has a set of these to compare the two. </p><p></p><p>Help! I am beyond frustrated with this, especially in the fact that the guys who claim to be in the tire business can’t seem to help. I have seen lots of threads about 305s on an inch wheel, and in many cases with less Offset – so - how the heck is that happening without the tires sticking out? </p><p></p><p>Many thanks for any help that the folks here can provide</p></blockquote><p></p>
[QUOTE="Dinosgt, post: 15521707, member: 169099"] Folks: I have a very perplexing problem with some Michelin Cup 2s. I had a set of forged Rotiform wheels made for my car (20 x 9.5 FR and 20X11 RR), with a rear offset of 55 mm. My desire was to also try the Cup 2s, and the “engineers” speced out a 305/30/20 to go on the rear. Ergo – my problem: Once installed, and the car on the ground, the tire stick out of the fenders about 4 mm (FWIW the rear is centered with the panhard). I don’t want the tires to stick out of the fender, and more so, no rubbing or other interference. Taking a closer look at the tire spec - The tread pattern on the 305 N01 Porsche tire that I have is 12.2 inches on a 12.3 inch section width. So - its very “square” in its profile. Interestingly, the Cup 2s also come in three “305/30” sizes with differing TREAD widths. They are: [LIST] [*]The Audi tire at 11.2” TREAD WIDTH [*]The Ferrari tire at 11.7” TREAD WIDTH [*]The Porsche tire at 12.1 TREAD WIDTH [/LIST] [U]Again - They ALL have the same section width of 12.3”. [/U]So it seemed obvious to me that I should just spec the Audi tire with the 11.2 inch TREAD Width and get the tire inside the fender. [U]HOWEVER, since they all have the same section width [/U]at 12.3”, will it really come inside the fender? I also looked at the 295/30 size, with a section width of 11.9” and a TREAD of 11”, but I am afraid it will look like a rubber band on the rear. (Its only 27 inches tall, vs the 285/35 on the car originally at 27.9”). Most frustratingly, my tire guy has been useless (i.e. no help), I called Michelin directly and got nothing; Talked to Tire Rack and Discount tire, and basically got no help either. My question is simple, does the profile of a tire with a 11.2 inch tread have different “look” than one with a 12.1 inch TREAD? I.e. is it more “rounded” than the 12.1 inch tread? I can’t find anyone that has a set of these to compare the two. Help! I am beyond frustrated with this, especially in the fact that the guys who claim to be in the tire business can’t seem to help. I have seen lots of threads about 305s on an inch wheel, and in many cases with less Offset – so - how the heck is that happening without the tires sticking out? Many thanks for any help that the folks here can provide [/QUOTE]
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HELP!! TREAD width vs SECTION width on Cup 2s
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