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• 5:45 the advantages of large chainrings and cogs
• 13:00 the drivetrain efficiency shortcomings  of SRAM AXS road
• 14:30 how efficient are 1x drivetrains?
• 16:30 the reason behind the prevalence of chain drops in road 1x systems and why chain catchers are key
• 22:45 the difference in efficiency between chain brands
• 29:30 nerding out gear inches and with gear-inch calculators
• 36:15 the efficiency cost of cross-chaining
• 40:30 the effect of cassette size on cross-chaining losses
• 48:45 the 105% rule of tire width to wheel width

Check out the wealth of free advice and guides for head to the INSTRUCTIONS tab on the Zero Friction Cycling site. Also subscribe to their YouTube channel and follow them on Instagram.