I've topped out at 52mph. It felt very, very fast.
On the flat, I did a 10TT on the A1 with a monster tailwind - I average out at about 27mph for five miles on a 72 inch gear. Problem was, the course was an out-and-back. The headwind for the last five miles was truly awful. Still held it at 18mph but nearly puked at the end.
I've topped out at 52mph. It felt very, very fast.
On the flat, I did a 10TT on the A1 with a monster tailwind - I average out at about 27mph for five miles on a 72 inch gear. Problem was, the course was an out-and-back. The headwind for the last five miles was truly awful. Still held it at 18mph but nearly puked at the end.