A wheel builder wants Josh's thoughts on the difference between road and track rims. A pro wants to know whether the sluggishness he senses in tubeless tires is all in his head. A gravel racer wants to know how to justify the purchase of a second set of wheels to his wife. And of course, the saga of hypotheticals continues as a listener asks what Josh would do if he were suddenly the Tech Director of the UCI. As always, it's a wide-ranging episode of Marginal Gains...and you will not want to miss it.