Ok to replace 1 tire only?

[seahawkeye]

Cut the wall of my left front tire on the out track of turn 7 of Blackhark Farms Raceway today (apparently they put speed bumps just past rumble strip to discourage cars from braking too little). Kind person gave me a spare to get home. I'm currently using MIchelin super sports 235/35/19 for all four tires. They don't have a lot of wear on them as it's pretty much a track car only for me these days--I've put maybe 4 tracks days on them (including 2 days at Road America), probably 1-2K miles max.

 

Do I need to replace both front tires? Or is it ok to replace just the left front?

[Loren]

Porsche says "always in axle pairs".

[seahawkeye]

Thanks, will do!  Now the question is, should I also replace the rears to match heating cycles?

[Loren]

You certainly can replace all 4 and be assured you have matched handling characteristics..

But if you plan on much track time you might want to consider "street tires" and "track tires".

[White987S]

Street tires don't really have "heat cycles" like R compound tires do. I'd be inclined to replace the one damaged tire. If needed, Tire Rack could shave the tire a 32 or two, to match the other current tire.

[seahawkeye]

Good to know, thanks!

[White987S]

Sounds like you were running our last DE event of the year at Blackhawk. Someone gave you a spare tire! That's awesome. Lots of great guys/gals in our Chicago Region PCA.