CeramicSpeed Pulley Wheels Shimano 11-Speed - 12 Tooth Narrow Wide Alloy BLK Crank Intended Use-Tandem Peak Nano Optics Photochromic is

Peak Nano Optics Photochromic is equipped with a high tech lens in X-PC with photochromatic abilities that darkens and lightens up automatically to the strength of the sunlight (UV light)

An urban favorite that's also getting lots of use by gravel riders

Color Black Rings 32 Number of Chainrings Chain Retaining Single Crank Length (mm) 175 Crank Intended Use Mountain Drivetrain Speeds 11 Drivetrain Speeds 12 BB Included No Pedal Spindle 9/16" Spindle Interface Type SRAM DUB Chainring BCD Direct Mount SRAM Chainline/Hub Compatibility 141/148 Boost Hubs Defined Color Black

The Surly TPU or Thermoplastic Urethane tube is a tough airtight material lighter than traditional butyl innertubes

5 Thread Length (mm) 9 Axle Diameter (mm) 15 Over Locknut (mm) 100 Overall Length (mm) 148

CeramicSpeed Pulley Wheels Shimano 11-Speed - 12 Tooth Narrow Wide Alloy BLK Crank Intended Use-Tandem Peak Nano Optics Photochromic isCeramicSpeed pulley wheels reduce friction last 3 5 time longer than stock high end pulleys and are designed to work with less drag. Premium Grade 3 Silicon Nitride Ceramic balls Hand built in Denmark Drivetrain Speeds 11 Fits Brand Shimano