Who would have thought that an invention from Silicon Valley in the 1980's would have changed cycling forever! The introduction of GPS filtered down into cycling computers, providing us with information, directions and data at the handlebar. Si Richardson and Dan Lloyd are on a mission to find out just how effective GPS computers are as they go head to head, Si with his Wahoo head unit and Dan going old school, with a map! Join us for the first episode of Revolution; a GCN+ series looking at cycling's biggest game changers!