`- Monocoque unidirectional carbon shaft, 2-bolt adjustable alloy clamp\n- FlexLogic carbon layup provides vertical compliance with no loss of lateral or torsional stiffness\n- 38mm rail clamping area, reversible clamp offers 5 or 15mm offset. 179g (27.2x400mm)\n- LINK-System clamp adapters sold separately: Vector Evo Saddles BTI #RC-4199, Selle Italia Monolink BTI #RC-4197