BlackStar 100R48 - 100 Pitch R Sprocket - 48 Tooth Poly Chain GT Carbon Extended The 11/B61 has a 21/32"

The 11/B61 has a 21/32" width

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The Gates PB21L050 PowerGrip Timing Pulleys is a synchronous timing belt with L-pitch profile

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The Megadyne 5/3V475 is a banded (5-rib) 3V V-belt with a 47

BlackStar 100R48 - 100 Pitch R Sprocket - 48 Tooth Poly Chain GT Carbon Extended The 11/B61 has a 21/32"The BlackStar 100R48 is a 100 pitch R roller chain sprocket with 48 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. Requires a Split Taper Bushing (sold separately). Specifications Part Number 100R48 Chain Pitch 100 Number of Teeth 48 Bore Type Plain Bore Hub Style R Strand Count Single Material Steel Outside Diameter 19. 82" Pitch Diameter 19. 113" Approx. Weight 57. 500