Enduro ZERO Derailleur Pulleys for Shimano 11-speed ModelNumber=K1539 Wolf Tooth Performance Headsets are

Wolf Tooth Performance Headsets are machined out of aircraft grade aluminum and assembled with Black Oxide Cartridge Bearings balancing quality and price

5 hour runtime depending on mode

Grade 3 Silicon Nitride balls

Rings 36-22 Rings 36/22 Defined Color Black Spindle Interface Type SRAM/Truvativ GXP Chainring BCD 64 Chainring BCD 104 Color Black Chainline/Hub Compatibility 135/142 MTB Hubs Drivetrain Speeds 10 Number of Chainrings Double Crank Intended Use Mountain Pedal Spindle 9/16" BB Included No Crank Length (mm) 170

4 PSI 60 TPI 120 Tire Bead Folding Tire Diameter 29" Tire Intended Use Mountain Tire Type Tubeless Ready Clincher

Enduro ZERO Derailleur Pulleys for Shimano 11-speed ModelNumber=K1539 Wolf Tooth Performance Headsets areEnduro ZERO Derailleur Pulleys for Shimano 11 speed. Enduro Zero Pulley Assemblies use grade 5 ceramic bearings. Races are won and lost by derailleur pulley drag. Sold in Pairs 9 Grams ABEC 5 precision cartridge bearing CERBEC USA Grade 3 Si3n4 Silicon Nitride balls 52100 high carbon Chromium alloy races Races receive 3 cryogenic treatments and a rust proof Magnetite finish "VV" type 2 lip non contact Silicone labyrinth seals Nylon graphite retainer