Sigma ROX 8.0 Triple Wireless Computer

The Rox 8.0's USB interface lets you transfer your training data to a PC for analysis.

The Rox 8.0's HR functions include ECG-precise measurements of your current, average, and maximum heart rate, along with three settable heart rate zones. Each zone has an acoustic zone alarm to notify you when you're exceeding or falling below your HR target. The display also shows your heart rate as a percentage of your maximum heart rate, along with your total calories burned and your total time in the heart rate zone.

Serious cyclists can opt to use the computer's cadence functions (current, average, and maximum), which help you ride efficiently regardless of your destination. Adding to the computer's versatility are six altitude measurement functions, nine uphill functions, and eight downhill functions. The altitude functions cover the basics (current altitude and current incline/decline) in addition to more advanced calibration functions, such as calibrating your starting altitude and calibrating via the air pressure. The uphill and downhill functions use this data to create a summation of your training session, with such tidbits as the day's total climb and descent, the day's maximum altitude, the trip distance, the rate of ascent and descent, your maximum ascent and descent speed, your average incline and decline, and your maximum incline and decline.

On top of all the other features, the Rox 8.0 includes a stopwatch, countdown timer, clock, alarm, three temperature functions, an LCD backlight, and a battery status display. The Rox 8.0 comes with a bracket for your bike handlebars and stem, and is adjustable to two wheel sizes. The computer also automatically recognizes a second bike, so you and a partner can train together using the same computer. And when you're done with your ride, the Rox 8.0's USB interface lets you transfer your training data to a Mac or PC. The information corresponds with Sigma's Data Center software, which lets you perform a comprehensive analysis of each training session. The Rox 8.0 requires a separately sold docking station to optimize the data transfer and analysis.