Depends on your preferred cadence, I've been using 53/15 this year and it didn't seem too spinny at 23:31 for 10 miles, but I know I can also stay on top of 53/14 at that speed. OTOH, one of my friends was knocking out long 21s consistently on 53/15, while another was usually a few seconds behind me on 60/15. As I've said many times, the right gear is the one that gets you to the timekeeper in the shortest time, not the one that makes you look good in the car park.
Depends on your preferred cadence, I've been using 53/15 this year and it didn't seem too spinny at 23:31 for 10 miles, but I know I can also stay on top of 53/14 at that speed. OTOH, one of my friends was knocking out long 21s consistently on 53/15, while another was usually a few seconds behind me on 60/15. As I've said many times, the right gear is the one that gets you to the timekeeper in the shortest time, not the one that makes you look good in the car park.