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I've had both, and see no reason for Cup2 aside from track times. They need to be warm, don't like wet, and don't add any performance aside from at a limit you will almost certainly not hit on the street.
I have read many comments on Cup 2s stating it makes a car feel like it was glued to the road. Very much better than PS4. I assume then this would all be related to track use as in the city it would be difficult to gain that performance from Cup 2s?
Correct: the “glue” happens on the track. For city/public-road driving, the PS4 would be the better tire. In addition, they’ll be better in the wet (Cup2 are not great) and they’ll throw less grit at the paint.
Those of you that made the switch, has it helped with less rocks being thrown up at the car? My rockers with ppf have taken a lot of wear and tear in very few miles
I didn't feel like there was much of a difference in how much was thrown up from the tires.
I am thinking of doing the opposite once my P zeros are worn. Maybe replace them with Michelin's Pilot Sport all season 4 in my Boxster 25. I don't track my car and almost all my driving is on backroads and some highway. It also gets cold in the mornings in NH in the fall.
I am thinking of doing the opposite once my P zeros are worn. Maybe replace them with Michelin's Pilot Sport all season 4 in my Boxster 25. I don't track my car and almost all my driving is on backroads and some highway. It also gets cold in the mornings in NH in the fall.
The old adage used to be all seasons = no seasons, the implication being they are inferior to a winter tire in the cold months and inferior to a summer tire in the warmer months, so you always have sub-par performance from them year round. I have heard great things about the PSA4 tires, though. I believe they are standard on the C8 vette.
The old adage used to be all seasons = no seasons, the implication being they are inferior to a winter tire in the cold months and inferior to a summer tire in the warmer months, so you always have sub-par performance from them year round. I have heard great things about the PSA4 tires, though. I believe they are standard on the C8 vette.
I think the C8 uses the runflat version. I have read good things about the all season Michelin Pilot Sport. May not be as sharp as the 4s but in my neck of the woods, both spring and fall have cold mornings.
The main difference I noticed with cup 2 in city/urban driving is that it's stiffer. Bumps and uneven roads transmit more into the car and steering. That's probably a negative if driving daily, but for occasional use I actually kind of liked it. Made the car seem a bit more lively.
The main difference I noticed with cup 2 in city/urban driving is that it's stiffer. Bumps and uneven roads transmit more into the car and steering. That's probably a negative if driving daily, but for occasional use I actually kind of liked it. Made the car seem a bit more lively.
Definitely better turn-in and front-end feel with Cup 2's.
I noticed the difference immediately in how the car drive going from cup 2s to ps4s. A different feel that is hard to put to words. I think I “prefer” how cup 2s felt on spirited country roads, but it’s such a small delta. The benefits of PS4S outweigh the tiny “feel” delta.
that being said I will probably switch to re71rs as I like to Track / Autox and 4S are not up to snuff there.
Possible daily commute means different things to different drivers. Here's my daily commute (picture) for which the turn in and grip of the Cup 2 tires are completely addicting. Can't imagine the Spyder without them.
I noticed the difference immediately in how the car drive going from cup 2s to ps4s. A different feel that is hard to put to words. I think I “prefer” how cup 2s felt on spirited country roads, but it’s such a small delta. The benefits of PS4S outweigh the tiny “feel” delta.
that being said I will probably switch to re71rs as I like to Track / Autox and 4S are not up to snuff there.
I don't think the RE71RS are available for the GT4 stock 20in wheels. I recently put on Yokohamas Advan A052 but haven't been to autocross yet. Other stock class autocross tires I see being used with 20in stock wheels are Nankang CR-S, and, if you live in hotter climates, Cup 2s and A09s.
I'm in the northeast US (PA). My CGTS's first 9K miles were on PS4S tires. Great tires!
Since I track my car several times per year, I figured the Cup2 tires would be an upgrade - after all, they came standard on the GT4 and Spyder, and Porsche knows what they are doing, right?
Well, I've had the Cup2 tires on for almost 3K miles now, including two track days and at least one AutoX - and they are NOT an upgrade for my use case! (85% street, 15% track/autoX) So I'm looking forward to getting the car back on PS4S tires.
For street driving in the northeast, it's hard to get Cup2 tires up to temperature except on warmer summer days. I'm actually shocked at how much less grip the Cup2 tires have when cold, compared to a PS4S tire at the same temperature. I've spent quite a bit of time looking for a chart from Michelin that shows grip-vs-temp on these two tires, because I'm convinced that the Cup2's only have an advantage over the PS4S tires once they hit at least 140-160 degrees. That temperature is hard to achieve on the street in my neck of the woods! But of course, that's not a chart that Michelin would want distributed even if it does exist.
So for the OP, my $0.02 is to stick with the PS4S tires!
04-07-2024, 09:10 PM
