12-27-2019, 06:40 PM | #1 |
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Michelin Cup2 - initially disappointed...
Hi
Just changed to Cup2 from AD08R and I feel the car is all over the road while braking hard. This was not the case at all with the AD08R. I assume this is because of the softer tire wall? Grip is great but that wobbly floaty feeling - also during quick lane changes........I am disappointed to be honest. I am running factory spec 225 and 245 section on 7.5J and 8J wheels. Can something be done with tire pressure? I am not tracking the car at the moment so what would you recommend for pressure for normal/fast street driving? Thanks
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12-27-2019, 08:07 PM | #2 |
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Are you driving 135i? If yes, you need camber plates for negative camber,
I tracked 135i for 6 years and in stock form that car was understeering like a bus. I never used these tires but I hear they are very good when pushed hard. Sticky tires need negative camber, especially on that car. I was running -3.5 front and -2 rear plus other suspension upgrades and only then I was able to use sticky tires and get all the benefit they provide. If you are not tracking your car you are wasting really good tires. For the street I would recommend bridgestones re 71 R tires. Hope this helps
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12-27-2019, 09:43 PM | #3 | |
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Will added camber help on the floaty steering and breaking feel?
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12-27-2019, 10:09 PM | #4 | |
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Sticky tires added to soft suspension will only make things worse.
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12-27-2019, 11:12 PM | #5 | |
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12-28-2019, 05:31 PM | #6 |
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Never drove ad08r but I had cup2 and there are very good if warm, what is Your tire temp? I noticed that they just start to grip around 40C and when they reach 60C they're doing great. They don't grip at all when cold in daily driving situations.
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12-28-2019, 08:52 PM | #7 | |
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12-30-2019, 12:37 AM | #8 |
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Listen...
I am NOT interested in track use feedback. I experience this in situation driving on the street. Examples: Fast lane changes and especially braking hard from around 200kmh.
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12-30-2019, 02:45 AM | #9 |
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To prove my experience... Guess there is nothing to do about that. I suspect the tire wall is so soft because these tires are primarily used on super cars with 20-21" low profile (take 911 GT3 as an example). A stiff sidewall would remove any sort of comfort.
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(A Dane in China) Last edited by harkes; 12-30-2019 at 03:44 AM.. |
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12-30-2019, 07:35 AM | #10 |
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01-06-2020, 12:22 AM | #11 | |
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01-12-2020, 08:07 AM | #12 |
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I saw mention of a RE71R as a street tire and I would like to toss in my two cents on that tire.
1) it's loud, transmits all the road into the cabin. 2) It's is not a good tire for the rain, hardly any tread. 3) It needs temp to be at it's best, otherwise it's on the hard side. I use these tires on the track and Pole Position S-04 on the street. The S-04 is a nice tire for the street with some grip. |
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01-12-2020, 09:16 AM | #13 | |
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01-14-2020, 12:20 PM | #14 |
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RE71R is an amazing street tire. I ran it on my E90 for over 40k miles. For the dry traction it is very good in the wet. Only time I had to be cautious was with standing water. You need to keep the tire pressure around 35psi to keep heat, but it heats up fast.
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01-14-2020, 04:30 PM | #15 |
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What wheels are you using with that tire combo?
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01-14-2020, 07:41 PM | #16 | |
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You got over 40k miles from the same set of RE71Rs? |
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01-14-2020, 10:58 PM | #17 |
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01-14-2020, 10:59 PM | #18 |
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01-15-2020, 08:25 AM | #19 | |
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I am using Apex ARC-8s with that tire and I drove 5 hours to Road Atlanta on them and it was not as enjoyable as a more street oriented tire would be. I was wondering if maybe the NVH issues came from the tires or the wheels. |
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01-15-2020, 12:50 PM | #20 | |
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01-29-2020, 11:54 AM | #22 |
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This is my experience from tracking my M3.
I ran 4 sets of AD08R before, they are good tires. Going to Cup 2, the cup 2 has very soft sidewalls compared the to the Yokohama tires. You should be running a higher tire pressure and more negative camber to compensate for it. I changed to Yokohama Advan A052. Much better track tire than AD08R or Cup2. I'm averaging 1-2 seconds faster over the Cup 2 on a 2 min track and it lasts longer. Compared to AD08R, it's a bit softer sidewall but a lot more grip. A052 also is strangely very quiet on the street if you want to drive it normally. It is just as quiet and civil as the AD08R.
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Last edited by Z K; 01-29-2020 at 12:00 PM.. |
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