Sigma Sport, Computer-Zubehör, MAGNET SPEED FERRITE, Speichenmagnet zur Geschwindigkeitsmessung, kompatibel mit: BC 5.0 WR, BC 8.0 WR, BC 10.0 WR, BC 12.0 WR, BC 14.0 WR, BC 5.16, BC 7.16, BC 9.16, BC 14.16, BC 16.16, Pure 1, BC 5.12, BC 8.12, BC 12.12, BC 14.12, BC 16.12, (Herst.Nr. 00537)