I got a new set of Pirelli Diablo Rosso 2 Tyres fitted just 2 weeks ago and have only done around 400 km on them. I have a (good) habit of checking tyre pressures at lest once a week and this morning did just that. I found the rear tyre on only 15 psi I checked on the tyre and found a small piece of metal stuck in there. Why is it that if you get a puncture it will always be when the tyre is new??? Jeez I'm mad!! Anyway, this is my first puncture in around 15,000 kms of riding. Do I really need a new tyre?? Or can it be fixed? I plan to take it back to where I got it fitted to see what they say. But would love some feed back. I don't know for sure what the metal is or if it has even actually penetrated the tyre. It's much to small to be a nail. I'd say the head is around 1mm diameter. I pumped the tyre back up and it has not lost any pressure yet, so the leak must be very slow. It was a week since I last rode the bike. Any advice is appreciated!!