Most bad 70.3 runs are paid for on the bike, usually in small, stupid ways that felt “fine” at the time. Overbiking in a 70.3 rarely looks dramatic. It shows up as little surges into wind, pushing climbs to “hold speed”, coasting and punching out of corners, and letting adrenaline decide the first third of the ride. This Ironman 70.3 race strategy breaks down how to pace the bike to run well, with two pacing frameworks (power and HR, plus Easy / Moderate / Medium / Mad), a T2 to 5 km execution plan, fuelling targets that match the pacing, and the warning signs that tell you to correct early. Controlled work buys you a run you can use.