Hi everyone,

I’m taking my 2019 718 Cayman S to its first track day next month and I’m trying to solve the longevity puzzle before I burn through a set of tires in a weekend or two.

I’ve just picked up a set of Apex SM-10s:

• Front: 18x9" ET46
  
• Rear: 18x10.5" ET44
  

Apex directly recommended staying with a 40-series sidewall (245/40 & 275/40) via email for the OEM suspension to avoid rubbing issues and keep the rolling diameter correct on the stock ride height.

The Goal: I am staying on the stock suspension (non-PASM) for now to baseline the car. My goal is to find an endurance-focused tire that can survive 4–8 weekend events (8–16 track days). I know that’s a big ask without camber plates (which are on the future mod list), but I want to see what's possible for a "seat time over pace" season.

I’ll be driving the car to/from the track (~2-3 hours each way).

Thoughts on these options:

1. Yokohama AD09: Does that reinforced sidewall actually help with shoulder wear on stock camber? How is longevity?
   
2. Goodyear Supercar 3: I've heard these are the best dual-duty choice, but can they actually hit 8-10+ days?
   
3. Hankook R-S4: Are these even findable in 275/40 anymore?
   

If you've run a stock 718 on track, what was your "best" tire for surviving a full season without incinerating the outer shoulders?

Thanks!