I think we broke the cords in both our front and rear tires last weekend. Both tires have a bulge in the sidewall. The rear tire has two bulges about 120 degrees from one another. There is no damage to the tread in either tire. We completed the ride and did not notice the front bulge until starting a ride the next day. We did not notice the rear tire bulge until another rider commented on the rear tire during the ride. I'm assuming we must have went over a nasty pothole. Am I correct? We inflate the tires to 135 psi. Their maximum rating is 165. Would we be better off to lower the pressure?