A fascinating piece of technology

The Sigma BC 12:12 STS is not a bike computer, which is sometimes just quickly connected to the bicycle and then declared himself. I write this because I usually easily without reading a description of a product get by, but here I had some understanding problems. Equal first I would therefore like to point out the great website sigmoid colon, to the individual at any bike computer Videoturorials to settings and function as well as various other useful tips can be found. But Sigma still sets it one and simulated under "Product Demo" the different bike computer on the PC. So it's possible for anyone to test all devices before buying on functions and operation and then make a purchase decision. For a quick overview, there is also a comparison table, which shows the differences between the devices tabulated Aryan.

When asked for wired or wireless connection I was initially unsure whether a Kabelverbingung with 100% functional guarantee would be preferable to the radio receiver. The optical and practical disadvantages of this variant (cable tension with strong arm or strikes - to prevent it - loosely hanging around cable) let me grab the radio variant. The decision was the right one, because at a distance of 63cm between transmitter and computer connection is consistently stable, wireless dropouts I had previously never complain. The only "advantage" of the cable models I see in their price, they either can be purchased much cheaper or the same price with more features.

Both sender and computer CR2032 button cells are used. These lithium batteries can hope for a good shelf life and temperature stability - I will report.

The installation of the transmitter is not difficult, but I have decided for the variant with cable ties, which keeps better than with the supplied rubber. The transmitter I have mounted against the driving direction at the fork, then he does not get from the full load, should I rush into the bushes times. The magnet (note the direction) may according to instructions at a distance of up to 12mm to the transmitter, connection problems (and also general), the distance should be reduced to a few millimeters in terms of a stable compound.
IMPORTANT: The sensor of the radio transmitter is headed, at this level of the magnet must be attached to the spoke.

The bracket for the computer I fixed with cable ties which I have been tightened with pliers. Now nothing wobbles more when I turn the computer from the mount. The film of the pads I have incidentally not withdrawn, therefore the adjustment of the angle is also possible later on.

Before using the tire circumference to be entered into the computer. Sigma delivers this in the installation instructions with a table that provides the values ​​for the most common tire sizes. The value of the 27.5 inch tire (57-584) should, however, be erroneous: The wheel circumference is given as 2128mm, but the value at 26 'wheel (57-559) is already 2120mm. Probably there is a number Dreher and is valued at 2182mm, what I can be approximated by its own measurements.

On departure, the receiver must first synchronize with the transmitter, which lasts up to 5 wheel revolutions or 10m. If the signal is not detected, can also be synchronized manually.

The minimum speed of the bicycle computer is just under 3 km / h is 0.0 otherwise indicated, the distance measurement will continue to run well here.

The functions can be found in the manual, I would just like to respond to the following:

The temperature display is a great idea, but it works quite sluggish. Even large temperature fluctuations (eg speedometer out of his pocket in the holder) be adjusted only with a change of about 1 ° / min, as can ever take a few minutes to be realistic values ​​displayed. When the sun shines on the speedometer, the function is not to be used, in the forest and under overcast skies, the accuracy is in the range of + -1 ° C.

The term "trip distance" in the description has me a little confused. In fact, is the "route" and is not (!) Automatically reset after one day. This must be done manually. Not to be confused are driving distance and "Total km" that remain when deleting the route. Then there's the "leg". It is here - and I quote from the description - "a separate routes / time counter which is started and stopped manually The [section counter] allows the scoring of a leg or an interval workout, without affecting the overall value of the tour. ".
Ranking ie: total distance - Trip alias route - section.

So as not every day having to delete several levels individually, there is a trick to reset route, journey time, average speed and max. Speed ​​at once. Calling this end one of the items and press the RESET button long. First, the selected point is deleted, now hold the reset button down, then the other tour dates are also deleted.

Overall I am very happy with the Sigma computers and can recommend it without hesitation. Of particular note is the excellent website on which the products can be thoroughly tested. If I am looking for a point of criticism, my display of only two different values ​​falls only on the display, three as Ciclo would be desirable.