Pacing Runners with Bike Computer

There are bike computers that give mph or kph readings to tenths and they'd be consistent. If properly calibrated they'd be quite accurate as well.

I've never seen a bike computer that reads minutes/mile from a wheel sensor, but I've never gone looking for one either. A triathlon oriented unit might have such a feature, but I'd think it would GPS based with the instantaneous accuracy issues inherent in that sort of system.

any decent bike computer should be accurate enough as long as its calibrated correctly, your tire pressure is correct, and you've inputted the wheel info correctly.

then print out a chart showing speed in mph or kph for each five or ten sec/mi within 4:00-8:00 depending on the athletes.

chart would look like this:

Speed (mph) vs Pace (min/mi)

8 7:30

8.1 7:24

8.2 7:19

8.3 7:14

8.4 7:09

8.5 7:04

8.6 6:59

8.7 6:54

8.8 6:49

continued as needed

keep in mind that there is no really simple mathematical formula to do in your head. the process is: 60/(speed, mph) but it gives you the pace with a decimal, which you must convert to seconds. you could do this on excel

Most watches are compatible with ANT devices. You can get an attachment that calibrates to the your wheel and bases distance on the number of revolutions.

Your chart points out that it is pretty simple. 8mph=7:30 pace. Every 0.1 change from that is roughly 5 sec/mile.

It is pretty simple to get a ball park with a decimal point.

0.5 is 30 sec

0.25 is 15 sec

0.75 is 45 sec

so 7.25= 7:15

Keep in mind, you do not need to be all that precise. Humans are not precision creatures.