I have built couple Trek Multitracks (700 and 750) with drop bars. One of them actually had Microshift Advent 1x9. I had Gravelkings 42's on it. They do fit big tires. I have some pictures on Hybrid bike forums on here under Trek Multitrack title. Its for people who get these bikes and show them off. Great frame to work off of, but you can spend some money if you do full restore.