Had concern about speed sensor not working from rear wheel, standard setup are shown on front wheel, the extra distance could prove bad signal, interference etc), but I have just brought a cateye V2 (speed inc cadence) and the candence and speed sensor are one unit designed to work from the rear wheel. So should work well. Looks good. If you also want a hr monitor the V3 looks good (I have on my watch to combine with running).