User manual BIKE NASHBAR ASCENT 8FC CYCLOCOMPUTER

[. . . ] Accurate to 0. 5m/h or KM/h AUTOMATIC RIDE TIMER (ATM) Stopwatch activated by front wheel movement, records true ride time (time spent actually riding) up to 9:59:59. SPEED COMPARISON (+ or --) Compares current speed to average speed. As you ride, a (+) or (--) will appear in the upper right hand corner of the display. This will indicate whether your current speed is faster (+) or slower (--) than your average speed. [. . . ] Press the left key (B) to select either miles (M/hr) or kilometers (KM/hr). Selecting Miles or Kilometers Selecting Miles or Kilometers STEP 3 Set your choice and advance to the wheel size set-up screen by pressing the right key (A) again. DETERMINING WHEEL SIZE The Ascent 8FC computer uses wheel circumference (measured in millimeters) to calculate speed and distance. Note that while your computer can be programmed to +/1mm for total accuracy, discrepancies of as much as 50mm will not have a significant effect on the accuracy of the unit for most normal rides. The following chart lists the programming sizes for some of the most popular tire sizes currently in use. These numbers are estimations which may not precisely match the circumference of your wheel due to variations in tire size between brands and models. TIRE SIZE 26 x 1. 7 26 x 1. 9 26 x 2. 0 26 x 2. 1 27 x 1. 0 CIRC. 2035 2055 2075 2095 2140 TIRE SIZE 27 x 1-1/4 650 x 20c 650 x 23c 700 x 20c 700 x 23c CIRC. 2180 1945 1990 2074 2114 TIRE SIZE 700 x 25c 700 x 28c 700 x 32c 700 x 38c 700c Tubular CIRC. 2124 2140 2155 2170 2130 WHEEL SIZE CALCULATION If your specific tire size is not listed in the chart, follow these steps to measure wheel circumference. With your tire inflated to its proper pressure, rotate your front wheel so that the valve is located at the bottom (6 o'clock position). Make a mark on the floor to indicate the valve location. STEP 2 Roll the bicycle forward in a straight line for one complete wheel revolution, until the valve is again at the bottom. Make a mark on the floor to indicate the valve location. STEP 3 Measure the distance between the marks in millimeters (1 inch = 25. 4mm). Enter this value in the computer (see "Programming Wheel Size" below). STEP 2 Attach the wheel magnet loosely to one of the spokes on the left side of the front wheel. Adjust the magnet and sensor positions by sliding both pieces around until you get the sensor as high on the fork blade as possible while still maintaining the necessary magnet to sensor spacing (1-2mm). NOTE: The magnet should pass within 1-2mm of the sensor, and the top of the magnet should be no higher than the top of the small arrow molded into the face of the sensor! Sensor Sensor Alignment Alignment Arrow Arrow Wheel Wheel Magnet Magnet Fork Leg Fork Leg 1-2mm 1-2mm Zip Tie Zip-Tie STEP 3 Route the sensor wire up the back of the fork and secure it with electrical tape. Do not use zip-ties to secure the sensor wire to the fork, as this may result in cut or broken wires. Be sure to leave enough slack in the wire to allow for the movement of the handlebar while steering, and the motion of the suspension fork, if your bike is equipped with one. STEP 4 Carefully wrap the excess sensor wire around the front brake cable housing, securing with electrical tape as necessary. When you are finished, you should have just enough slack for the computer mounting bracket to reach the handlebar. Check to make sure that all of the excess sensor wire is either taped down or wrapped around the brake cable so that nothing can snag it during a ride. Valve Distance (in mm) Valve PROGRAMMING WHEEL SIZE STEP 1 Once you select miles (M/hr) or kilometers (KM/hr) and press the right key (A), the computer will automatically advance to the wheel size programming screen. STEP 2 The factory default setting is 2074 (700 x 20C). Use the left key (B) to adjust the value. [. . . ] NOTE: Hold this key to quickly advance the hours. Press the right key (A) to set the value and advance to the minutes setting. STEP 3 Advance the minutes using the left key (B). NOTE: Hold this key to quickly advance the minutes. [. . . ]