PRO Vibe 7S Stem - 100mm - 31.8mm - Black Size_XL however Challenge have called it

however Challenge have called it an Open Tubular)

"Engineered for the way you ride"

Brake type: V-brake or calliper

Weight: 130g

Size: 29 x 3

PRO Vibe 7S Stem - 100mm - 31.8mm - Black Size_XL however Challenge have called itPRO Vibe 7S Stem 100mm 31. 8mm Black The PRO Vibe 7S Team Sky Stem. The Vibe 7S Stem is a high performance, lightweight oversized 7075 T6 stem. Used by many top professional riders, the Vibe 7s features an oversized 31. 8mm clamp diameter to reduce flex and increase strength and stiffness. The Puzzle clamp system evenly spreads load through the clamp area and reduces weight High performance lightweight oversized alloy 7075 T6 stem as used by top