Originally Posted by FarHorizon
Why would lower pressure make a difference?
Because you're gonna be in for a crazy rough ride at 125 psi on bad roads
The reasons I'm wanting larger tires (and high pressure) are to avoid pinch flats and protect my rims. I'd think that higher pressure would be a step in the right direction, or am I missing something? Thanks for the prompt reply!
The wider your tires, the lower the recommended pressure in general. This is because a wider tire has a wider contact patch, and therefore doesn't need as high a pressure to support the same weight (Pressure = Force or weight / Area).
Pinch flats are often caused by low pressure; this does not mean that raising your pressure really high will protect you more and more from them. Usually if your tire pressure is within the manufacturer's recommended range, you won't get pinch flats. Going too high won't provide much additional protection, and will invite other problems as I mentioned in my above post.