>>1387981I had this vittoria randonneur cross tire that I thought was 28mm, but maybe it was 30mm. Anyways, I don't recommend it but it worked for me on a Cannondale road bike.
Found some more.. Kenda karv, continental tour ride, CX Pro HS 269, ritchey speed max (32mm)
Goldball size worries me though. I have ridden these narrow style in fine gravel but not big chunky stuff. You might do better getting a rigid 90s MTB with 2.0" tires