4iiii makes a good crank based PM. Single sided is all you need to get started training by power. If that is more expensive than your bike, then you probably need to wait till you can afford a better bike. You can still get good training with HR if you understand it. I recommend using your lactate threshold for setting your HR zones. And read up on training by LTHR numbers.
Welcome to BF.
Who doesn't need a PM? No one needs one if they aren't absolutely positively needing to be the very best that they can be in the shortest amount of time.
Last edited by Iride01; 04-23-24 at 08:59 AM.