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Question for MPSC 245 45 16 users
Could someone measure the tread width of a Michelin Pilot Sport Cup size 245/45/16, Michelin does not publish the data, they seem narrow for there size.
Thanks, Jack Last edited by Jack Gresham; 12-13-2005 at 05:00 PM.. |
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12-13-2005, 12:27 PM
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12-13-2005, 05:01 PM
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12-14-2005, 05:16 PM
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Join Date: Jun 2004
Location: New York
Posts: 1,307
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Jack,
Our notes show an actual contact patch width of 7.75" after 16 minutes of running in 78 degree weather, mounted on an 8" wide BBS wheel. We have several posts describing the huge descrepancies in actual tire dimensions compared to what their "numbers" are supposed to indicate. And you are absolutely right to believe that these Michelins are fairly narrow. But, we found the MPSCs very similar in size (width and profile) to many other "R" compound, longer life, street-and-track tires. For comparison, we have photos of this very tire standing beside the exact same (nominally) sized Goodyear GS/CS 245-45-16, also mounted on an 8" BBS rim, with 20 minutes running. The Goodyear, which has much squarer shoulders, appears to be a full inch shorter diameter and 2 full inches wider! We hope this helps, Ed LoPresti |
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12-14-2005, 08:43 PM
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Thanks Ed,
When I first saw the tires I wished I had bought 225's and 245's instead of 205's/225's. I am very happy with the MPSC's at the track, when I wear these out mabe I will try the larger size combo, what would you recomend ? My wheels are 7x16 / 8x16 Fuchs. Maybe Michelin built them like that for a reason ! Thanks, Jack 87 Carrera |
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12-15-2005, 04:32 PM
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Join Date: Jul 2001
Location: Connecticut
Posts: 1,942
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I run 225/245 on my SC but they are 17's and are 8/9 widths. Most MPSC runners will use the 255 on back. I chose the 245 to take a bit of understeer out of the car.
Also since the MPSC seems to like to be worked harder than other DOT-R's don't think that you're losing a lot by using a narrower footprint. There not as "studly" but it may be the better way to go if you are running in the damp or cool conditions. Even if you are running in high temps the MPSC can most certainly handle it. You also have the option of running some spacers since the tire isn't filling the well as much. It may be a better set up that way. You've increased the track of the car and you've maximized the tire width- rim width ratio. Again, here wider is not always better. The 205 is perfect on a 7 and the same for the 225 on the 8. A lot of guys run too much tire and sometimes it's incorrect to put as wide of a tire under the fender as possible unless you have the power and overall set up to maximize it. Get the wider ones next time and compare your notes...that's one of the best parts of trying new stuff; building your own database of what works and what doesn't.
__________________
'83 SC |
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12-15-2005, 04:45 PM
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Thanks, good info.
Jack |
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12-16-2005, 03:30 AM
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Join Date: May 2004
Posts: 758
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The width difference for the same size with different brands is amazing. I researched this when I bought new tires several years ago. Generally speaking, the Dunlops are the widest - some as much as 2" wider than the skinniest! The Bridgestones are on the skinny side. If I remember correctly the Michelins are in between.
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12-16-2005, 06:15 AM
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12-20-2005, 10:08 AM
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1987 Porsche 911 3.2
