This episode is all about numbers. First off, Fatty says there are four key numbers you must know when racing the Leadville 100, but they aren't the ones people put on their top tubes. Next, Jonathan Lee of TranierRoad joins to help you get ininto the zone -- your training zone, of course -- and how to understand and incorporate zones into your training. And finally, Hottie has a chat with USWE about their newish pack and we discuss who will (and won't) benefit most from it.