I got my panniers for my rack they are awesome I loaded it up with 12 lbs of my usual crap ( I am now bringing lunch instead of eating out ) and the back tyre looks like it is flat (checked for leaks and what not) I pumped the tyres up past the recommended 75 psi these are old tubes and tires on 27" wheel. To get down to the question with this looking flat will the rim have damage when I hit a bump? I am a between 170 and 200 lbs (not to sure haven't had an accurate scale to weigh my self after considerable weight loss