Sigma STS Cadence And Speed Transmitter Bike 2 Complete Set - BlackSigma STS Cadence And Speed Transmitter Bike 2 Complete Set Black Sigma STS Bike 2 Complete kit speed cadence for all TOPLINE 2012 2009 and ROX bike computer. Compatible with the following STS kits: BC 1609 STS, BC 12. 12, BC 16. 12 STS CAD, BC 1909 HR, BC 2209 Targa, BC 2209 MHR, Rox 8. 1 and Rox 9. 1. Set includes: STS speed transmitter STS cadence transmitter Spoke magnet Cadence magnet STS bracket 2032 STS bracket 2450 Features: STS speed