jm8571 said:
I have Conti Sports on my 325i SP and was wondering if a flat could, or rather should, be repaired. I had a small, yet robust, splinter of wood puncture the tread yesterday. TIA
It really depends on you. Normally when a tire is punctured and repaired, the speed rating (H, V, W, ZR, ZR-Y) is compromised and the tire loses its ability to function at said limits. However, for daily, highway driving there's no need to worry about speed exceeding H rated tires.
However, if you EVER plan on going to any of the performance driving schools or auto crossing, they do NOT allow patched or repaired tires because on the track you WILL be testing the limits of the tires.
If it was up to me, I'd replace the entire set of Conti Sports with something a little grippier like a Sumitomo HRZ IIs or if you have a stash of drug money around, Bridgestone Potenza Pole Position S-03s. But that's just me.

Repairing ($20) vs. replacing ($600-1,000) is a big difference.