Just got my new bike today, a trek 7.6 FX, and I had to take her for an extended ride. Five miles wound up turning into twenty and it was a blast. She handled so well that I didn't want to stop. About ten minutes after my ride my arms and hands became numb, almost like a dead arm feeling. I haven't rode in about ten years so I am not sure if this was due to working a new muscle group or if I wasn't fitted properly on the bike. I do have extension grips so I did change hand position often during the ride.