Originally Posted by
beardrooler
In that picture, I was riding my bicycle, just to show you how flat it looks like when I sat on my bicycle.
So 26 1.5 is bigger?
I answered your question in my first post. "Maybe" is the best answer we can give without discussing individual tire models.
I share everyone else's skepticism that your tire is really pumped up to 70 psi. You should get a better pump, or see what happens when you pump up the rear tire to 80 psi.
P.S. Perhaps more to the point, going from a 1-3/8" tire to 1.5" will not improve your situation.