Sturmey archer Drum Brake Parts Front/Rear HSB-516 90mm ModelNumber=K5191 but they will be safe

but they will be safe with these discreet protection points

Defined Color Gray Direct Mount Type Direct Mount SRAM Drivetrain Speeds 12 Material Aluminum Ring Position/Type Chain Retaining Single Ring Round or Oval Round Tooth Count 46

Sizes 38T and 42T are non-aero

}Pedros External Bottom Bracket Socket Tool For 16-Notch External Bearing BB Cups

Number of Chainrings No Rings No Spider IncludedDrivetrain Speeds 12Drivetrain Speeds 13Chainring BCD Direct Mount SRAM 8-BoltChainline/Hub Compatibility 135/142 Road Disc Hubs < 415 mm ChainstayChainline/Hub Compatibility 135/142 Road Disc Hubs > 415 mm ChainstayColor CarbonCrank Length (mm) 160Crank Intended Use RoadCrank Intended Use GravelBB Included NoPedal Spindle 9/16"Spindle Interface Type SRAM DUBDefined Color Carbon

Sturmey archer Drum Brake Parts Front/Rear HSB-516 90mm ModelNumber=K5191 but they will be safeReplacement small parts for Sturmey Archer hubs TECH SPECS Vendor Sturmey archer Manufacture Number HSB516. 0001. 0P Model Name Drum Brake Parts Category Hubs