Every serious cyclist is familiar with the question: what should I invest in to make me go faster? In addition to a frame, there’s a whole jumble of parts—not to mention clothing—that can speed you up. Bike-maker Specialized did a wind-tunnel test to see how many seconds you could save using various upgrades (inc. clothing and parts) over a distance of 40 kilometres. Are you on the verge of investing in that major upgrade you’ve been saving up for? Then check out the video below to see which upgrade will give you the best aerodynamic-advantage for your buck. At least, if the wind’s coming straight at you…