After my most recent trip in my 31, I discovered a broken outer front wheel bearing. The race was cracked in two places and a piece of a ball bearing was also present. The curious thing was that the bearing had only been in the car for slightly less then 100 miles. Could this broken bearing have been caused by an improper install after only 100 miles or is this more likely a manufacturing defect? I am trying to figure out if I just buy a single replacement ball bearing or consider upgrading to roller bearings.