I'm going to buy a hrm. I am looking at polar s-120,and Timex 5d741. both are available from performance. The polar is $100 and the Timex is $70. I am leaning towards the Timex. 1-price. 2- has 5 target zones while the polar only has 3 target zones. I already have cyclocomputer w/cadence. My training partner has a timex iron man hrm that he likes,but it only has 1 heart rate zone. I don't know alot about them, but I want to learn how to use them the right wat. I'm reading Cyclist Training Bible and it has alot of good detail on HR's. Ant body have advise I'd like to hear it.
