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Sigma

Sigma BC 14.12 ALTI Wired Cycling Computer

★★★★★4.3 (687 reviews)

Wired cycling computer with altimeter, speed tracking, and temperature gauge for data-driven rides.

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Overview

The Sigma BC 14.12 ALTI is a wired cycling computer built for riders who want comprehensive ride data in a straightforward, dependable package. It tracks actual speed, average speed, and maximum speed, and includes a comparison feature that shows how your current pace stacks up against your average in real time. Beyond speed, it measures distance per trip, cumulative total distance, and ride time with an automatic start/stop function that pauses recording when you stop moving.

Where this model stands out from basic cycling computers is its built-in altimeter, which displays current altitude and accumulated climbing over a ride. Combined with the temperature gauge, this gives hill-focused cyclists useful environmental data without stepping up to a GPS unit. The wired sensor design trades the clean look of wireless setups for a rock-solid signal that won't drop out or require sensor batteries. The unit itself is waterproof and includes a backlight for visibility in low-light conditions, along with an energy-saving mode to extend battery life between replacements.

Key Features

Function-Speed Sensor Function: actual speedkm/h

Function-Speed Sensor Function: Comparison of current speed and average speed

Function-Speed Sensor Function: average speedkm/h

Function-Speed Sensor Function: max speedkm/h

Function-Temperature Gauge ✔

Specifications

Brand
Sigma
Model
BC 14.12 ALTI
Sensor Type
Wired, Uncoded
Speed Functions
Current, Average, Maximum, Speed Comparison
Distance Functions
Trip Distance, Total Distance
Altimeter Functions
Current Altitude, Accumulated Altitude
Temperature Gauge
Yes
Time Functions
Clock, Interval, Travel Time
Waterproof
Yes
Backlight
Yes
Auto Start/Stop
Yes
Battery Level Indicator
Yes
Power Source
Battery

Pros & Cons

👍 Pros

  • Built-in altimeter tracks current altitude and accumulated elevation gain
  • Wired sensor connection provides reliable speed readings without wireless interference
  • Waterproof design withstands wet weather riding conditions
  • Includes temperature gauge for ambient conditions monitoring
  • Displays current, average, and maximum speed along with a real-time speed comparison

👎 Cons

  • Wired installation requires routing a cable from the fork to the handlebars, which is less clean than wireless units
  • Uses an uncoded sensor signal, which could potentially pick up interference from nearby wired computers
  • No GPS functionality, so it cannot map routes or export ride data to apps
  • Limited to a single wheel size profile without details on multi-bike support

Frequently Asked Questions

Yes, it is battery-powered. The unit includes an energy-saving mode to extend battery life. Check the packaging for the specific battery type required.
A physical wire runs from the handlebar-mounted display unit down to a sensor on the front fork near the wheel. The wired connection provides a reliable, interference-free signal without needing to pair wirelessly.
Yes, the unit is waterproof, so it can handle rain and wet riding conditions without damage.
It displays your current altitude and tracks accumulated altitude gain, which is useful for measuring total climbing on hilly rides.
Yes, it includes a built-in temperature gauge that shows the ambient temperature during your ride.

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