Sigma's PC 22.13 is a simple, reliable, and smart way to train. You can view your current heart rate, and the total number of calories burned during your workout. And, with only two buttons, the PC 22.13 is incredibly easy to use.
Chain Reaction Bicycles is your local bicycle shop for the San Francsico Bay Area! Unlike some other shops, we are dedicated 100% to serving the needs of local cyclists; our offerings are exclusively available for in-store pickup. Our "northern" store is located at 1451 El Camino Real, Redwood City CA, 94063. 650 366 7130. Our "southern" store is located in Foothill Crossing Shopping Center, 2310 Homestead, Los Altos CA, 94024. 408 735 8735. Our hours and directions to our stores may be found here. We look forward to taking care of all of your cycling needs, including service! Mike & Steve Jacoubowsky, Partners, Chain Reaction Bicycles. Serving you since 1980!