This might be the most underrated topic in all of cycling, and I say that knowing how many episodes we have done on training, nutrition and equipment. Tyre pressure is free speed that most of you are leaving on the table, and you do not need to buy a single thing to take advantage of it.
For years the received wisdom was simple — pump your tyres as hard as they will go. Max PSI, rock-hard, job done. And that advice made sense in a world of narrow 23mm tyres on perfectly smooth velodromes. But we do not ride on velodromes. We ride on roads with cracks, chip seal, manhole covers and gravel patches, and on those surfaces the physics works differently.
I break down the two components of rolling resistance — casing deformation and impedance — and explain why they pull in opposite directions. A harder tyre does deform less at the contact patch, which is where the max-PSI myth comes from. But it also bounces off every surface imperfection, and that bouncing converts your forward energy into vibration that travels up through the frame, through your body, and is lost as heat in your muscles. A slightly softer tyre absorbs those bumps, keeps the rubber on the tarmac, and preserves more of your energy for actually moving forward.
The practical takeaway is that most riders can drop 10 to 15 PSI from what they currently run and be measurably faster and noticeably more comfortable. I walk through how to calculate your starting point using rider weight, tyre width and road surface, and why your front and rear pressures should be different because of how weight sits on a road bike.
Try it on your next ride. It will cost you nothing except two minutes with a track pump and an open mind.
Join the free Roadman community: https://www.skool.com/roadmancycling