Josh answers a batch of listener questions, from the extremely practical to the fascinatingly hypothetical. Are pros flatting more than they used to? Has the balance between strong and light swung too far toward light? How do you make your hydration as aero as possible? What air pressure should be used for the back wheels on a competitive trike? And how good would electronic / wireless brakes have to be before you could trust them? We get into all this and more in this Ask Josh Anything episode of Marginal Gains!