Bike Yoke Barkeeper Stem (35.0mm) 35mm - Raw Forged Finish Description-Axle Chainline/Hub Compatibility 141/148 Boost Hubs

Chainline/Hub Compatibility 141/148 Boost Hubs Chainline/Hub Compatibility 157 Super Boost Hubs Color Gray Defined Color Gray Direct Mount Type Direct Mount e*Thirteen Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Material Aluminum Offset Flip-Flop 0/5 Ring Position/Type Chain Retaining Single Ring Round or Oval Round Tooth Count 30

}Wolf Tooth Direct Mount Chainring - 34t SRAM Direct Mount For SRAM 3-Bolt Boost Requires 12-Speed Hyperglide+ Chain Black

}Zipp 303 Firecrest Carbon Rim - 650 Disc Brake Matte Carbon 24H Front/Rear

The Melvin uses two pulleys just like a rear derailleur which gives it 20 teeth of chain wrap

Bike Yoke Barkeeper Stem (35.0mm) 35mm - Raw Forged Finish Description-Axle Chainline/Hub Compatibility 141/148 Boost HubsOne piece design for incredible high strength to weight ratio, at the expense of some compatibility: not every handlebar will be compatible to the Barkeeper stem Highly precise production includes: complex 3D forging, multi tempering, CNC machining of critical contact interfaces, shot peened for surface hardening, laser engraving, and anodizing All three available lengths (35mm, 45mm, 55mm) were successfully tested to match and exceed the requirements