[BRIEF] Shimano's 13-Speed Leak Hides a Bigger Story

We build durable cyclists. New performance videos every week on YouTube: 👉 https://go.semiprocycling.com/go/7a92v5 --- Shimano GRX is reportedly going 13-speed on a new MicroSpline Road freehub. The gear count is irrelevant — the freehub change signals Shimano restructuring its entire drivetrain ecosystem, and it tells us more about Dura-Ace's future than GRX's present. Daily cycling intelligence…