With a refined Italian minimalist aesthetic, latest-generation performance, integrated design, and a proprietary micro-tuning fitting system. The Trittico stem is the obvious choice for your new handmade frame or an exclusive upgrade to your existing cockpit system. Tuning Sleeve A proprietary feature developed internally by Columbus. This sleeve integrates with the traditional spacer, offering superior functionality in the form of three micro bike position tuning variants that allow the user to perfect the fit of their bicycle. Italian Minimalism The Trittico has been designed for the cleanest aesthetic. Bolts are hidden from view whilst maintaining fast and easy regulation and maintenance. Lightweight reliability A cold-forged aluminum front plate ensures the best connection with handlebars at the lightest weight. Technical Specifications Sizes (Sleeve 0mm): 90mm, 100mm, 110mm, 120mm, 130mm Angle: -8 Degrees Weight: 176g (110mm) Adjustment sleeve +5mm: Resulting length: 95mm - 105mm - 115mm - 125mm - 135mm Adjustment sleeve: -5 Degrees: resulting angle: -13 Degrees