Machined aluminum clamps and armrest bases with carbon fiber extension (choose for 26.0mm or 31.8mm bars). Dual-clamp, wishbone handlebar mount on 31.8mm version (single-sided clamp for 26.0mm). Bent-upsweep, 1-into-2 Y profile carbon fiber extension offers a strong, minimalist design for exceptional positioning, control, comfort. Separate extension/armrest clamps for independent adjustability. 7-position armrests and fore/aft adjustable carbon extension with independent angle adjustment (extensions accept bar-con style shifters)