BMX Bottom Bracket Measurements Updated 2 years ago
Are you unsure of what bottom bracket you need for your frame? Below is a graph that will show you all of the different bottom bracket measurements. We would highly recommend using a set of vernier callipers to get the most accurate measurement possible.�
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If you do run into any problems please don't ever hesitate to email us for help: [email protected]�
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BB Type
Shell ID
Shell Width
Shell Type
Standard Spindle Options
Internal or external
Euro (BSA)
34.92mm
68/73mm
Threaded
19mm, 22mm, 22/24mm (Sram), 24mm thru (Shimano), 30mm (Praxis/Box 30/28mm)
Both
USA
51mm
Not defined
Push in
19mm, 22mm, 23.8mm (15/16") (24mm Freestyle)
Internal
Spanish
37mm
66mm
Push in
19mm, 22mm
Internal
Mid
41.275mm
68/73mm
Push in
19mm, 22mm, 23.8mm (15/16") (24mm Freestyle)
Internal
BB86/92
41mm
86mm
Push in
19mm, 22mm (Profile Kit), 24/22mm (Sram), 24mm Thru (Shimano), 30/28mm (Praxis/Box), 30mm Thru
Internal
BB30
42mm
68mm
Push in
19mm, 22mm (Profile Kit), 24/22mm (Sram), 24mm Thru (Shimano), 30/28mm (Praxis/Box), 30mm Thru, 35/33mm (Praxis/Box)
Both
PF30
46mm
68mm
Push in
19mm, 22mm (Profile Kit), 24/224mm (Sram), 24mm Thru (Shimano), 30/28mm (Praxis/Box), 30mm Thru, 35/33mm (Praxis/Box)
Both
BB90
37mm
90.5mm
Push in
24/22mm (Sram), 24mm thru (Shimano)
Internal
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Spindle/BB Type
Euro/BSA
USA
Spanish
Mid
BB86/92
BB30
PF30
BB90
19mm
Y
Y
Y
Y
Y
Y
Y
N
22mm
Y
Y
Y
Y
Y
Y
Y
N
23.8mm (15/16") (24mm Freestyle)
N
Y (mid cups)
N
Y
N
N
N
N
24/22mm (sram)
Y
N
N
N
Y
Y
Y
Y
24mm thru (Shimano)
Y
N
N
N
Y
Y
Y
Y
28/30mm (Box/Praxis)
Y
N
N
N
Y
Y
Y
N
30mm (thru)
Y
N
N
N
Y
Y
Y
N
35/33mm (Box/Praxis)
N
N
N
N
N
Y
Y
N
