Goodyear Eagle F1 Asymmetric 5 vs Kumho Ecsta PS91 — Compared

“2024 J1.1 GTS Sport Turismo on 21" Spyder RS wheels here. Went from Pirelli PZero's to NF1 Goodyear Eagle F1 Asymmetric 5's recently. They don't seem any louder than the PZero's, dry grip seems about the same, as does comfort. Wet grip and performance in cold conditions (I'm in Scotland, UK) over the PZero's is noticeably better. Very little in the way of the Ackerman effect in cold temperatures, compared to the PZero's which made an awful noise and skipped badly when turning at slow speeds, pulling out of junctions. Will see how they do wear rate wise, PZero's had about 2.5 to 3mm left at 16k miles. Anything approaching that on the ASY5's would be good. Unfortunately on the J1.1 on 21"'s the choice is essentially PZero's or ASY5's. Which is disappointing as I had PS4S's and CSC7's on my previous cars (G81 M3 and M340i Touring) and they were fantastic.”

“I have them fitted in both my cars (Audi A6 and CLK350). Neither had the performance of your AMG but I can confirm they are the best tyres I’ve ever had in terms of grip and feel.”

“my turbo came with a set of Kumho Ecsta PS91 in the OEM widebody sizes that were around a year old and had maybe lost 15% wear. coming from someone who loves PS4S, i hated them. grip was subpar. it felt wasteful to toss them though since they were relatively new and had decent tread left so i toughed them out. i got maybe 2k miles out of the rears before they needed replacement just from normal street / occasional spirited driving. they are not a great handling tire and they are quite bad from a wear perspective as well. just buy michelin or even continental and don't look back.”

“Pretty terrible idea, the PS91 will not have the same heat capacity as the V730, so your front/rear grip balance will change wildly during a session. With the non-200s on the front, at least you’ll understeer instead of oversteer/spin, but not ideal. An experienced driver might be able to work around this, if you’re new, this would be a dangerous situation. Similarly, I wouldn’t mix something like a yokohama AO52, which delivers all of its grip from cold and tends to overheat within a couple laps, with something like a hankook RS4, which famously takes some time to warm up and then delivers consistent grip for a long time”

“I've only got a couple thousand on them and just spirited driving in the mountains. I think they will easily go over 10k even with a few track events. I am thinking about getting a set for my SVT focus as I autoX with that car, much easier to drive at the limit than a turbocharged S197.”