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 318mm clamp diameter to reduce flex and increase strength and stiffness the puzzle clamp system evenly spreads load through the clamp area and reduces weight this special edition team sky stem celebrates pro39s collaboration with team sky and features their iconic blue on black theme pro vibe 7sn