Originally Posted by
vane171
I am going to forget about heart rate, it would cost almost as much as what I paid for the bicycle. Those straps I've seen are made for runners and the readout goes to a watch on your wrist. It does all things, probably all you list, but it will cost you a bundle (it even measures the up and down movement or acceleration as your knees flex while you run and such like, which is good stat for your medic who looks after your knees or a trainer who looks after your running style efficiency...). It is luxury item that running yuppies out there will have. I am sure some are made for cyclists and read goes to your cyclo computer, but again, it gets rather expensive.
???
$70.
Works with any ANT+ head unit and it supports BT.
https://buy.garmin.com/en-US/US/p/649059
Originally Posted by
vane171
As to built in sensors, key word is 'standard'. Just because it is built in doesn't mean you will be stuck with Garmin computer or whatever. And those computers that take reading from those sensors can change, develop. It is like there is one Bluetooth or Ant+ and you can use what phone you happen to have with those sensors that have it.
???
The sensors are already standard. Supporting BT is fairly new but it's becoming the standard (it appears).
Garmin's current sensor supports both.
https://buy.garmin.com/en-US/US/p/641230
The problem with built-in sensors is that they make building the frame and the crank more expensive. To replace already standard, already-available sensors that are already cheap. It's not likely the built-in sensors would be cheaper than the current sensors.
The built-in speed sensors require magnets.
That is, in that case, the sensors can't change (the new sensors don't use magnets at all).