I went for a ride this morning and stuffed about 85psi into my rear Michelin 700X28c on the tourer. Got about 5 miles in and was aware of tyre rub. When I stopped the tyre was off the rim for about 2 inches on 1 side and the tube was poking through! I had to deflate it, reseat they tyre and pump it up to about 50psi with the hand pump. I was a bit surprised as the tyres are rated to up to 87psi on the sidewall. Perhaps I hadn't seated it properly when I fitted it or perhaps the tube wasn't located properly? Whatever the reason, it's a first for me.