CeramicSpeed Pulley Wheels Shimano 11-Speed - 12 Tooth Narrow Wide Alloy BLK Crank Intended Use-Tandem The Surly TPU or Thermoplastic

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

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

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

Windproof four-way stretch material

04 The thru axle adapter kit is for bikes with a 12 mm thru axle

CeramicSpeed Pulley Wheels Shimano 11-Speed - 12 Tooth Narrow Wide Alloy BLK Crank Intended Use-Tandem The Surly TPU or ThermoplasticCeramicSpeed 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