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Sigma Rox 8.1 Wireless Cycling Computer

Item #: CP244A11
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Train With The Sigma ROX 8.1 and Train With Power

The Sigma Rox 8.1 Wireless Cycling Computer is designed for the cyclist looking to maximize their training by analyzing the data from their cycling computer.

Knowing your power output is the quickest way to efficient and effective advances in your fitness and speed. Sigma has optimized their power formula to attain power output numbers that are based on the power required to move the bike rather then the power asserted on the pedals. Sigma’s formula takes into consideration bike type and position, bike and rider weight, rider height, shoulder width, speed, incline and cadence.

The Sigma Rox 8.1 features 64 total functions in 12 different categories and uses a digitally encoded 3-channel wireless system. To keep all the data manageable and accessible, the Sigma ROX 8.1 allows you to customize the screen with up to 10 different functions on screen at one time.

  • Wireless Computer
  • Power Function
  • Altitude Monitor
  • Heart rate monitor
  • Auto Start/Stop
  • Stopwatch
  • Auto conversion between MPH & KMH
  • 7 available languages
  • 2 adjustable wheel sizes
  • Total distance bike 1, bike 2 & bike 1+2 (not shown while riding)
  • Cadence Optional
  • Programmable trip section counter; up & back
  • Current temperature
  • Backlight
  • Weatherproof
  • Current speed
  • Average speed
  • Maximum speed
  • Trip distance
  • Current/Average speed comparison
  • Total distance (not shown while riding)
  • Ride time
  • Clock (12/24 hr)
  • Total ride time (not shown while riding)
Sigma ROX 8.1 Product Demo


by PowerReviews
Sigma SportSigma Rox 8.1 Wireless Cycling Computer

(based on 1 review)

Ratings Distribution

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Reviewed by 1 customer

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A complete ride report card

By dtnerb

from Northern Virginia

About Me Avid Cyclist

Verified Buyer


  • Durable
  • Easy to Use
  • Lightweight
  • Versatile


  • No Odometer

Best Uses

  • Long Rides
  • Road Bikes
  • Training

Comments about Sigma Sport Sigma Rox 8.1 Wireless Cycling Computer:

Cadence sensor is a bit bulky. Cadence is also likely to be intermittant near power lines. Heartrate and speed do not seem to be affected.
Only 3 heart rate zones. All the heartrate, altitude, power and cadence data calculated is really cool. Gives one a really good history of the ride.

  • Was this a gift?:
  • No

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Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.