Originally Posted by zacster

These are GP5000 tires, and I weigh around 190. I would never ride with tires that low. That sounds way too low and would cause problems. I put my numbers in the calculator and the front says 75 and the rear 95. I still would not ride with 75 in the front. I was going to try somewhat lower, maybe 85F/90R. In any case, when I've gotten flats on the road and pump up the spare as hard as I can with a hand pump to around 75 it always felt squishy.

On my commuter bike I use Gatorskins in a 26" size and even these I pump up to 90. I don't always pump these up before I take that bike out and it too would feel squishy if I let it go too long. I ride in NYC too, not known for smooth roads, but they aren't as bad as you'd imagine either. When I ride my fat tire bike I keep the pressure down but that's a different beast.

And another thing, I just check Conti's website and they are rated at 95-120 psi, so 95 is at the low end. That doesn't mean you can't go lower, it is just what they recommend. I take that with a grain of salt too as it could just be the way to get maximum wear out of them.