Stretched tires
As long as it's within manufacturers specs I don't consider it a stretch. For a 255/40-17 that is between 8.5-10. And the manufacturer will tell you themselves closer to 8.5 for comfort due to increased sidewall flex. Closer to 10 for max performance.
A 255/40 on a 10 is perfect. You're maximizing the tires performance and generating more mechanical grip.
A 245/40 on a 10. That's stretched.
A 255/40 on a 10 is perfect. You're maximizing the tires performance and generating more mechanical grip.
A 245/40 on a 10. That's stretched.







some look ok but some stuff in this thread
245/35 on 10 Bridgestone Potenza