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2015+ Shelby GT350 Mustang
GT350R tire gaffe or good furtune
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<blockquote data-quote="ANGREY" data-source="post: 16197218" data-attributes="member: 188865"><p>315's will "fit" on an 11" front rim and as you tested, if they don't rub or clash, then you COULD run them on the front.</p><p></p><p>What the tire purists will tell you is that running a track dedicated tire too fat on the rim will stand the sidewalls up vertically and they won't "rollover" properly under lateral load. Apparently, the tire was designed to have a slight rake inward so that when the car turns and loads laterally, the sidewalls "rollover" and the lateral grip is better than if the sidewall started vertically already.</p><p></p><p>Hope this makes sense. Basically the tire gurus argue that a 305 on the 11" up front will perform better than the 315 on an 11" for turning purposes. For braking and straight line acceleration, the bigger tire/patch is probably more effective, but for maximum turning grip, the sidewalls weren't meant to be squared up.</p><p></p><p>To what extent this makes a difference, whether there's other factors (like excessive wear at the track one way or the other, how it effects the optimum camber settings, how much heat the tire takes on during repetitive lateral loading, etc) who knows.</p><p></p><p>Essentially, bigger doesn't necessarily always translate to better when it comes to tire sizing (and turning).</p></blockquote><p></p>
[QUOTE="ANGREY, post: 16197218, member: 188865"] 315's will "fit" on an 11" front rim and as you tested, if they don't rub or clash, then you COULD run them on the front. What the tire purists will tell you is that running a track dedicated tire too fat on the rim will stand the sidewalls up vertically and they won't "rollover" properly under lateral load. Apparently, the tire was designed to have a slight rake inward so that when the car turns and loads laterally, the sidewalls "rollover" and the lateral grip is better than if the sidewall started vertically already. Hope this makes sense. Basically the tire gurus argue that a 305 on the 11" up front will perform better than the 315 on an 11" for turning purposes. For braking and straight line acceleration, the bigger tire/patch is probably more effective, but for maximum turning grip, the sidewalls weren't meant to be squared up. To what extent this makes a difference, whether there's other factors (like excessive wear at the track one way or the other, how it effects the optimum camber settings, how much heat the tire takes on during repetitive lateral loading, etc) who knows. Essentially, bigger doesn't necessarily always translate to better when it comes to tire sizing (and turning). [/QUOTE]
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2015+ Shelby GT350 Mustang
GT350R tire gaffe or good furtune
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