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

Chainline 52mm with 3mm offset for DUB

Color Black TPI 60 Weight 1100 Weight (oz) 39 Defined Color Black ISO Width (mm) 65 ISO Diameter 622 / Road / 29" Tire Intended Use Mountain Tire Diameter 29" Tire Bead Folding Labeled Size 29 x 2

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

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