Did a 20-25 mile hilly ride a few days ago. Throughout about 3/4 of the ride my average was about 12 mph. However the last few miles I hardly dropped below 30mph, hit 40mph a couple of times. Also a bit of flat terrain with a tail wind allowed me to maintain 25mph or so for a mile or 2. Overall average was about 14mph. My typical average varies between 14 and 17mph. Typical pace on a flat in good conditions is about 20mph. My averages are calculated on time spent moving. My speed/time isnt measured when I stop which I find useful. No point timing yourself when your not actually doing anything unless its an actual race. Reading water tho! dont have a clue what that means.