opedaler from Northeast Nebraksa on 4/21/2019 3:36:52 AM:
About 28"s.....My wife told me after seeing my response that she agrees with Alex. Although we do, she feels MUCH more comfortable on 32's on up. 90% of the time she feels fine, but to be comfortable ALL the time, she would recommend a bigger tire. Mountain bikes aren't usually necessary, but you will see a plethora of them on the trail. After the repairs this year, I would agree, bigger is better.