went out on the bike today for a bit of cross country and get this..looking at my speedomoter it states my average speed was 43.1mph over 14.51miles and my top speed was 174.4!! happend so fast never knew it happend. lol. so either i should enter the guiness book of records or my unit is playing up? mmm...leave it for you to decide. wireless any good? couple of mates think they aint.