Bottom Bracket Informations

Bottom Brackets.info offers a wide range of information about different bottom bracket and crank standards.
Over the last couple of years a lot of different standards for frames and bottom brackets has been developed by the bike industry.
The main goal of all these standards was to reduce weight while maintaining or even improving the stiffness of the drive system.
But it also lead to a wide range of different systems not compatible to each other.

Today there are cranks with several different spindle diameters available, Shimano uses a 24mm diameter on both (drive and non-drive side), SRAM/GPX uses 24mm on the drive and 22mm on the non-drive side. Furthermore a lot of American manufacturers are using 30mm spindles.

With special adapters you are able to use Shimano and SRAM/GPX cranks togehter with those 30mm bottom brackets.

Our Bottom Bracket Search provides an easy way to find the right bottom bracket with the help of the bottom bracket width and diameter, as well as with the help of your crank diameter. Using Tools&Parts you can also find the right tool for the installation and spare parts for repairing your bottom bracket.
Type Frame Width  Frame Ø  Crank Ø  Details 
BSA 68,0 mm
73,0 mm
83,0 mm
100,0 mm
34,9 mm 24,0 mm Details
BB30 68,0 mm
73,0 mm
42,0 mm 30,0 mm Details
PressFit 30 68,0 mm
73,0 mm
46,0 mm 30,0 mm Details
BB86 86,5 mm
41,0 mm 24,0 mm Details
BB92 91,5 mm
41,0 mm 24,0 mm Details
BB90 90,5 mm
37,0 mm 24,0 mm Details
BB95 95,5 mm
37,0 mm 24,0 mm Details
BBRIGHT DirectFit 79,0 mm
42,0 mm 30,0 mm Details
BBRIGHT PressFit 79,0 mm
46,0 mm 30,0 mm Details
386EVO 86,5 mm
46,0 mm 30,0 mm Details
OSBB Carbon 61,0 mm
46,0 mm 30,0 mm Details
OSBB ALU 68,0 mm
73,0 mm
42,0 mm 30,0 mm Details
Italian 70,0 mm
35,9 mm 24,0 mm Details


Bottom Bracket Details:

BSA (Englisch)

Name:  
Frame Width:  
68,0 mm
73,0 mm
• 83,0 mm
• 100,0 mm
Frame Diameter:  
34,9 mm
Crank Spindle Diameter:  
24,0 mm
Mounting:  
Thread: 1,37in x 24 TPI, Right = left-handed thread, left = right-handed thread
Mnemonic: In Driving direction = open

BB30

Name:  
Frame Width:  
Frame Diameter:  
42,0 mm
Crank Spindle Diameter:  
30,0 mm
24mm with special bottom bracket
Replacement Bearings:  
Mounting:  
6806 Industrial Bearing (42x30x7mm) are directly pressed into the frame on both sides. The bearings are secured using 2 lock washers.

PressFit 30 / PF30

Name:  
Frame Width:  
Frame Diameter:  
46,0 mm
Crank Spindle Diameter:  
30,0 mm
24mm using special bottom bracket
Replacement Bearings:  
Mounting:  
BB cups with an outer diameter of 46mm are pressed into both sides of the frame.

BB86 / BB92

Frame Width:  
Frame Diameter:  
41,0 mm
Crank Spindle Diameter:  
24,0 mm
30mm with special bottom bracket
Mounting:  
BB cups with an outer diameter of 41mm are pressed into both sides of the frame.

BB90 / BB95 Trek

Frame Width:  
Frame Diameter:  
37,0 mm
Crank Spindle Diameter:  
24,0 mm
Mounting:  
MR2437 bearings are directly pressed into the frame on both sides.

BBRIGHT DirectFit Cervelo

Frame Width:  
Frame Diameter:  
42,0 mm
Crank Spindle Diameter:  
30,0 mm
24mm with special bottom bracket
Replacement Bearings:  
Mounting:  
6806 Industrial Bearings (42x30x7mm) are pressed directly into the frame on both sides, and secured using 2 lock washers.

BBRIGHT PressFit Cervelo

Frame Width:  
Frame Diameter:  
46,0 mm
Crank Spindle Diameter:  
30,0 mm
24mm using special bottom brackets
Replacement Bearings:  
Mounting:  
BB cups with an outer diameter of 46mm are pressed into the frame on both sides

386EVO

Name:  
Frame Width:  
Frame Diameter:  
46,0 mm
Crank Spindle Diameter:  
30,0 mm
24mm with special bottom brackets
Replacement Bearings:  
Mounting:  
BB cups with an outer diameter of 46mm are pressed into both sides of the frame

OSBB Carbon Specialized

Frame Width:  
Frame Diameter:  
46,0 mm
Crank Spindle Diameter:  
30,0 mm
24mm with special bottom brackets
Replacement Bearings:  
Mounting:  
BB cups with in outer diameter of 46mm are pressed into frame on both sides

OSBB ALU Specialized

Frame Width:  
Frame Diameter:  
42,0 mm
Crank Spindle Diameter:  
30,0 mm
24mm with special bottom bracket
Replacement Bearings:  
Mounting:  
6806 Industrial Bearings (42x30x7mm) are pressed into both sides of the frame and secured using 2 lock washers.

Italian

Name:  
Italian / ITA
Frame Width:  
70,0 mm
Frame Diameter:  
35,9 mm
Crank Spindle Diameter:  
24,0 mm
Replacement Bearings:  
- - -
Mounting:  
Thread: 36mm x 24 TPI

Enduro Bearings Dealers:


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