44 - Go Faster on the Bike Pt 3

3:00 custom, 3D printed aerobars4:00 off-the-shelf, long-pad options8:30 Morf bars11:15 the advantages of shorter crank arms13:15 crank length is part of your drive train17:00 into the weeds we go about crank arm length!20:00 Andrew’s thoughts on ceramic bearing upgrades: a lot of money for minor gains21:30 where do you find bearings on a bike and how upgrading them to ceramic may be beneficial23:15 the benefit of oversized jockey wheels26:00 the benefit of a clean and lubricated chain27:00 what does a squeaky drivetrain mean28:00 pros and cons of dry lube29:30 1x vs 2x drivetrains: 1x is simpler and a little more aerodynamic, but at the cost of higher friction drag39:00 rewind to the cost of a full Ceramic Speed upgrade 41:00 on tires, tire pressure, and rolling resistanceContinental Gatorskin @ 29kph & 100PSI has a rolling resistance of 20.2W / tire (40.4W per pair)Continental GP5000 @ 29kph & 100PSI has a rolling resistance of 10.7W / tire (21.4W per pair)48:00 tire pressure: hysteresis losses vs vibrational losses51:45 max tire pressure: tire max vs rim max54:15 wider tires will have a lower rolling resistance at the same air pressure as narrower tires55:15 get a pump with a reliable pressure gauge 56:00 butyl tubes vs latex tubes: latex tubes must be inflated more frequently, but come with a savings of ~2W per tire (4W total) when compared with butyl58:15 the cost of poor cornering in a course with a 90deg turn every 1km If baseline for a confident bike handler, cornering at 0.8g is 240WThen someone who is overly cautious and can only corner at 0.3g is 247W1:04:00 revisiting rim vs disk brakesCheck out part 1 and part 2 of our series. The resources we sited in the episode were the 1x v 2x article, the excellent Bicycle Rolling Resistance site, and the FLO tire pressure article.