Surly Ring 38t x 110mm Stainless Steel MFPN=52523 Zee M640 Shimano model #

Zee M640 Shimano model # can be found on the fluid resevoir

These thru axles have an external male threading on the end to accommodate the installation of Burley's axle mounted hitch system

It sports an integrated master cylinder in the ergonomically shaped lever body

Torq Stick Torque WrechPull & rotate to select your target torque value

Surly Ring 38t x 110mm Stainless Steel MFPN=52523 Zee M640 Shimano model #Surly Stainless 5 bolt ChainringsNo ramps or shift gates Surly rings paired with 9 speed chains will have a tight fit. No compatibility with 10 or more speed drivetrains Made from 304 Stainless Steel Ring Position Type Single Tooth Count 38 Drivetrain Speeds Single Speed 3 32" Chainring BCD 110 Color Silver Defined Color Silver Teeth 38T Width 110Mm