Finally had a break in the weather here and I finally had some free time to try my new Thunderos mounted front and rear. 700 x 45. Ride consisted of chunky gravel, loose gravel (from the grader), easy gravel, gravement and some pavement. Have to say I was impressed. The tire gripped well in all the gravel conditions and on pavement rolls very fast. I might pick up a Swampero to try in the front.