closesupport said:truthfully what purpose does that have! i find half the time that i would just prefare a large speedo that tells me if i'm going slow or fast, if my legs don't hurt then i can go faster.
i find alot of the time i'll glimpse at the HRM only when i'm recovering, so when its back down to 130 then i'm off again, when its 180 - 185 you can tell if your going faster or slower, as for gears on a flightdeck?
have you not got a kneck that you can bend, just to glimpse at the cassette?
Why crane your neck when you don't have to? It's just a simple convenience and it comes on a system with a lot of great features. Some ride for the wind, some for the pain, some for an escape from the home, bills, spouse or whatever. Some of us ride for the numbers. Numbers can be just as motivating as all of the other reasons to ride and pushing to new limits is best confirmed when the numbers tell the tale.