Jason Sumner
Latest articles by

Castelli Tempesta Race Jacket review
By Jason Sumner last updated
Not yet ratedA near-perfect solution for rainy days, with incredible eVent fabric

Anthony Delaplace's Tour de France Look 796
By Jason Sumner last updated
3D-printed cover hides Di2 junction box inside the top tube

Pro shoes: Shimano's limited edition R321B
By Jason Sumner last updated
Expect to see these blue shoes on riders at the Tour de France

Pro bikes: Devolder's Domane Classics and Domane Koppenberg
By Jason Sumner last updated
Identical rider geometry on two very different Domane IsoSpeed Decoupler bikes
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