English translation in progress. The German version is the canonical source for now.
Tire Width. Why wider rolls.
30 mm rolls faster than 25 mm in nearly every condition. Lower rolling resistance at the same pressure, more comfort, more grip. The only reason for 25 mm was aerodynamics — and aero rims today are wide enough that this no longer holds.
Go deeper
Setup
Tire pressure
Half-system-weight is obsolete. What hookless rims dictate.
Buying guide
Which tires
GP 5000 S TR, Pro One TLE, P Zero Race TLR, Corsa Pro head to head.
Fundamentals
Tubes vs. tubeless
When tubeless pays off, and when TPU tubes are the honest choice.
Market
Value vs. S-Works
Where expensive watts vanish. Best bike at half the budget.