Nov. 3rd 60 degrees sunny no wind. It doesn't get much better than that. A shorter version of the ride we did Dec. 2017. Today there was lots of fresh gravel. I was trying to see how much air I could let out of my tires. I actully got down to 15 psi in the front which was fine on the gravel, but a bit squishy on pavement. In the back I still had 32 psi. So I'm thinking 25 psi is probably a good lower limit on this bike for loose gravel.