Please allow me to clarify as my thought process and typing were aparently on different planets (I'll blame it on blonde roots). I do about 17-19mph on average road; 21-23 on hills. My hubby is VERY competitive so he pushes me for all I've got. However my average speed for hills and road combined over a 12-14 mile run is only about 14mph. That's why I am nicknamed "PuttPutt".