I've gone round Herne Hill on my road bike, with 175mm cranks and been nowhere near grounding a pedal.
Of course, I have no experience of other tracks
I've been round Calshot, slowly, with 175s. It is possible to ground them, but only if you turn right on the steep bit of the banking with the drive side pedal down.
I've been round Calshot, slowly, with 175s. It is possible to ground them, but only if you turn right on the steep bit of the banking with the drive side pedal down.