Rick and I were 9 miles into our ride (which was about a quarter of the total) on Fruit rd at the intersection with Marine rd wanting to turn right onto Marine rd. A grain hauling tractor trailer was slowing at the intersection on Marine rd going south and had the stop sign but did not stop, rather rolled through the intersection. I was signaling our intent to turn right on Marine rd as we had the right of way, we had no stop sign. Rick was able to stop his bike standing upright but I wasn't and crashed off to the right side of the road into the gravel chunks and rocks. I went down pretty hard which resulted in road rash and bleeding to my left calf, knee, hip, elbow and shoulder as well as tearing a tendon(which chipped the bone) on my left ring finger. The driver of the truck did pull over and walked back to apologize, admitted that he did not come to a full stop but said that he did not see us as we were in a blind spot due to the location of his mirrors. Rick and I both had on our bright flashing led headlights on the front of our bikes as well as flashing red taillights. We then had to ride the 9 miles back to our parked cars. The starting point was in Hamel where we had met at 8:30am.