Bottom bracket – First T47 30 mm

37,40 
68/73 mm, 30 mm axle, M47 x P1.0

Bottom bracket – First T47 GXP

28,23 
68/73 mm, 24/22 mm axle (SRAM GXP), M47 x P1.0

Bottom bracket – First T47 DUB

38,98 
68/73 mm, 28.99 mm axle (SRAM DUB), M47 x P1.0

Bottom bracket – First T47 DUB

43,19 
77 mm, 28.99 mm axle (SRAM DUB), M47 x P1.0

Bottom bracket – First T47 DUB

37,40 
85.5 mm, 28.99 mm axle (SRAM DUB), M47 x P1.0

Bottom bracket – First 73 PF46 DUB

51,19 
73 mm case width, 46 mm case diameter, 28.99 mm axle (SRAM DUB žvaigždžių blokams)

Bottom bracket – First 73 PF42 DUB

49,75 
73 mm case width, 42 mm case diameter, 28.99 mm axle (SRAM DUB žvaigždžių blokams)

Bottom bracket – First 86.5 PF41 DUB

27,19 
86.5 mm case width, 42 mm case diameter, 28.99 mm axle (SRAM DUB žvaigždžių blokams)

Bottom bracket – First 86.5 PF46 DUB

27,65 
86.5 mm case width, 46 mm case diameter, 28.99 mm axle (SRAM DUB žvaigždžių blokams)