Routing options: This bicycle lift seat tube controller supports both internal and external routing, providing installation flexibility to match your bike's frame and cable layout. comfort: The 22 mm diameter lever is designed to be positioned for quick, comfortable reach and easy accessibility while riding. Anodized coating: The anodized finish enhances aesthetics and provides oxidation resistance for durable, longlasting performance. Secure nonslip grip: The textured lever surface ensures a firm, reliable grip for safer handling and control during rides. Use scenarios Road or gravel bike with internal routing: Choose internal routing to maintain a clean, streamlined look while retaining easy access to the lift control. Mountain or touring bike with external routing: External routing offers straightforward installation when internal routing is not feasible, with minimal frame modification. Frequent seat height adjustments on commutes or rides: The lever's size and placement enable quick, confident adjustments on the fly, improving overall riding comfort and responsiveness.