The Giro d’Italia saw losses for Tom Dumoulin and a win for Primoz Roglic, the Tour of California may finally be won by its home team, and a couple of old sprinters are back in the headlines for all the wrong reasons. This week’s episode opens with a discussion of the latest racing news — all these things, and more — and then turns to the decidedly nerdy. 

Get out a pen and paper, because it’s time to go to class. Caley and James discuss tire sizes for gravel riding and racing, and note the somewhat linear relationship between the amount of dirt and gravel in an event, and the size of the tire best suited to that event. Except, as always, for the pile of caveats.

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