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Shop Sigma BC 8.12 Bicycle computer with wheel sensor, multicolor (black / gray). Free delivery and returns on all eligible orders.BC 8.12. Easy to use. Quick to attach, simple to set, easy to understand, and simple to operate at the push of a button. Automatic start/stop. The automatic 29 Oct 2012 29 Oct 2012 SIGMA SPORT // EUROBIKE 2014 // new products // BC 8.12 ATS black, BC 14.12 STS ALTI (US) What is the top speed that can be displayed by the bike computer? What is the range of my ATS/STS transmitter (speed/cadence)?