Mount the speed and cadence sensor on the left side of the bike opposite of the drive side. You'll want to mount it fairly close to the bottom bracket. Next mount the magnets on the wheel and left crank arm. Before securing the zip tie on the crank arm make sure the cadence works properly be spinning the crank backwards and see if the computer starts showing a reading. Once you have the cadence working then work on the speed sensor. Also you can adjust the spacing of the pick up arms by loosening the screw and rotating the arm as needed. Just be sure to tighten the screw once you have the pick up arms where you want them.
Good Luck!
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