Training HRs are very individual. 160 BPM would be just sub anaerobic threshold for me and I would use this heart rate for higher intensity intervals.
On the other hand, I can run very comfortably and work on endurance at any HR below 148.
Some people have higher avg HRs and will train at much higher levels.
HR zones for different types of training depend on many factors: age, genetics, training history, body weight...
I would strongly encourage you to search this site and others on the web to get a better understanding of HR. I know there have been previous discussions on this topic in this forum.
Also, I use a book by Joe Friel, "The Triathletes Training Bible", to guide my workout plans. He does a very good job of explaining the role of HR in training and how to do self testing to estimate you HR zones.
Hope that helps.
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