my road bike got a puncture in the front wheel yesterday while I was riding down a big slope, it happened when I was braking the bike then I heard a pop. I stopped and replaced with a new tube, resumed riding, and another pop when I was down a small slope, I remember I braked a bit as well. Two punctures appeared to be near the valve.
I checked the rim and its tape, didn't find any obvious spike or anything.
Question 1: do I need to replace the tire?
Question 2: what causes the wear on one side of the tire?
update: just found out the second tube I replaced, is a 650/18-25c tube, my rim is 700...