We are a heavy (360 lbs) tandem team. After the latest in a series of tire blowoffs, I bought a Bontager Select K (700x28) from the repair van that was assisting the ride we were on. I pumped it up to 100 psi and we finished the ride without further problems. Later I noticed that the recommended pressure on the tire is 70 psi. 70 seems so low that I'm afraid we'll get pinch flats. Will it hold us at 70? At 100, I'm afraid we'll have another blowoff. Any experience with this tire, and if so at what pressure have you been running it?