I put in 26-30. I average around 30 but sometimes stretch it to 35 when I got time. My in inbound is 12-13 miles with a longer route home for fun.

Chicgoland suburbs, which have some some trails. There are no safe road routes all the way to my work, so I travel on limestone and gravel trails 60+% of my ride, the rest road. I commute with a cyclocross, which is just perfect for this combination.