durk onion wrote:
If you have a powermeter, you should be pacing yourself by power and your speed is what it is based on a variety of conditions (grade, wind, drafting, etc.) Speed does not provide actionable information.
For road racing, I look at distance so I know how far it is to the decisive points (turn arounds, climbs, etc.) For group rides I use it to know how far away from home I am and if I should turn around early or go longer based on what time it is. You could do the same with average speed but the math is harder and I assume that most people are talking about instantaneous speed.
I display instant speed on my screen but don't use it to pace. Like your situations with distance, it's not something I am constantly using but it can come in handy when you know you need to get X distance in Y amount of time. Not in terms of racing...but if you're going to be late for work on a commute, you need to meet up with the start of a group ride and are running late...etc. You can't just say I'm going to push 235 watts and I should be okay because speed doesn't matter.
I also use speed to make sure I'm not speeding while riding through some military areas...since the SPs have no issue with pulling you over if you're 5 mph over the speed limit on a 8% downhill. And heaven forbid you go over 15 mph in a military housing area.