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Down tube of the Wilier Filante SLR ID2 in Firelight Red with the silver Wilier Triestina wordmark and an aero bottle in its cage, lit against a red and purple background

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Wilier Filante SLR ID2: Built in collaboration with Groupama-FDJ United

How Wilier and Groupama-FDJ United co-developed the Filante SLR ID2 — from NACA-airfoil forks and a 420-configuration fit system to an Aerokit triangle that cuts drag by two-thirds.

By Charlie Allenby

Photography by Wilier

28 JUNE 2026 | UPDATED 12.35 PM BST

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Rouleur Issue 144 — The Tour Issue
In printIssue 144

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The Tour Issue

Le Tour de France: a race defined by colour, passion and history, whose drama and romance continue to shape the identity of cycling’s greatest stage.