Originally Posted by
raymeedc
I just installed one on my Cruz. Very intuitive operation & easy readout. I like the cadence monitor, acts like a tachometer on a manual shift auto. The only problem with this wireless unit (&and all other wireless models, to my understanding) is that it doesn't actually readout your current speed/cadence, but the speed/cadence you had achieved a few seconds prior. Data takes a few seconds to transfer to the screen (& intermittently yet, not continuously). Not the best of circumstances, but hopefully technology will soon catch up.
It doesn't have anything to do with it being wireless or wired. Think about what it's doing and how it works. For cadence it's counting and averaging pedal revolutions over a time period and for speed it is counting and averaging revolutions of a known size wheel over a time period and converting to speed . And depending on what that moving time period is (which will be implementation dependent) it will be delayed by that amount. I don't think that any amount of technology could improve the latency because even if you used instantaneous velocity sensors you would still need to average the reading over a period.