Using a GPS unit while mountain biking offers many excellent opportunities: tracking fitness goals, navigating unfamiliar trails, and documenting and sharing......
http://www.amazon.com/Samsung-Holder-Record-Awesome-Action/dp/B00MYN0CGI/ref=sr_1_4?s=wireless&ie=UTF8&qid=1457625124&sr=1-4&keywords=Galaxy+Chest+Harness Have any of you guys used a devise like this or this particular one. I was wanting to buy...
