I have a beast of a mountain bike (Raleigh M50) I've been taking on long smooth paved asphalt trips. The 26x1.95 knobbies originally on there were holding me back, so I decided to switch to 26x1.5 Bontrager Select Inverts, considerably smoother. Needless to say, the squishy knobbies led to a soft ride on rougher pavement around the neighborhood at 35psi. The new slicks are at 80psi and really lead to a rougher ride on rougher neighborhood pavement. I understand the high pressure slicks were never intended for rough conditions, but they do come standard on aluminum hybrids meant for around town use. Similarly, aluminum road bikes must suffer from the same forces.
I am certain my aluminum frame is under greater stress now with the higher pressure slicks, so I am wondering if anyone has noticed a trend in aluminum frame fatigue in relation to tire pressure and absorption capabilities? Has anyone noticed a higher rate of frame failure on aluminum road bikes?