Garmin 305 gone nuts!!
I rode down to Brighton from London on Saturday morning, had pre-loaded the route via mapmyride the night before and it guided me there effortlessly. Then, on the return it decided to lose it's mind, started displaying speeds of about 55mph (i'd like to think i'm quick, but gees..) down Clapham High St. Anyone else encountered this kinda issue, and how did you rectify it? It's gonna look good on my training records, but does represent what's actually happening! This morning, through SW London i averaged 30mph, including about 3 longish stops for red lights so it's definitely playing up..