Surly Ring 38t x 110mm Stainless Steel MFPN=52523 and 30mm spindle diameters for

and 30mm spindle diameters for maximum compatibility

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

Hubs (F/R):

Ratchet LN uses the same inner parts as the freehub Ratchet System where the difference lies in the freehub system seal located on the freehub body Rear Axle Type 12mm Thru-axle Rear Hub Spacing (mm) 142 Cassette Body Type SRAM XDR Material Aluminum

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

Surly Ring 38t x 110mm Stainless Steel MFPN=52523 and 30mm spindle diameters forSurly 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