The SC 45 SL i23 is an evolution of the previous SC models, now featuring a 23 mm internal rim width for improved compatibility with wider tires and enhanced stability, along with a brand-new PRS hub with a 54-tooth ratchet system for faster, more efficient power transfer derived from our top-of-the-line Metron technology.Key Features:Full carbon clincher rim, 45mm depth x 31.1mm width x 23mm ID.PRS hubs with 2:1 aero bladed direct pull spokes.6 sealed cartridge bearings (2F + 4R).Artisan built, entirely by hand.Rim tape (Clincher TL) and spoke protector.Proprietary SL Disc brake version.MicroSpline 12 speed.Centrelock rotor mount.Colour graphics.Weight: 1,542g per pair - clincher without QR and rim tape.Options for (front) TA-12, (rear) X-12.