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  1. #1
    mtbr member
    Join Date
    Feb 2008

    Sigma Onyx Pro or Other HRM to Follow Friel Book?

    I want to use a HRM to follow the Friel MTB training bible. It's going to need to have zones that I can set to do this. The Sigma Onyx Pro looks good. Can you confirm this HRM will work for what I want to do? Or should I get something else. It needs to be the wristwatch style so I can use it for skiing in the winter. Thanks!

  2. #2
    I Have Cookies
    Reputation: ae111black's Avatar
    Join Date
    Dec 2008
    I use an Onyx easy and it works great!! its pretty cheap too!
    The most important thing is what God thinks about it. He will have the final say.” – Joshua Stinebrink


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