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Bottom Bracket Types - Page 2

Repair & Tech Info - Bikeman Tech Info

Article Index
Bottom Bracket Types
Page 2
Page 3
All Pages

...Bottom Bracket Types, Continued


Page 1 - External Thread-In Bottom Brackets (Hollowtech II, GXP, X-Type...)

Page 2 - Internal Bottom Brackets (square taper, Octalink, ISIS...)

Page 3 - Internal Press-In Bottom Brackets (BB30, BB86, BB92...)


Internal Bottom Brackets:

Bearings Housed On Inside Of Bottom Bracket Shell



ISIS Spline



ISIS - Shop For Them Here
10 spline, 21mm spindle. Compatible with any crank designed to be used with an ISIS bb, regardless of brand. Not Shimano compatible.







TruVativ PowerSpline

TruVativ Power Spline - Shop For Them Here
TruVativ design fits only TruVativ cranks designated as Power Spline compatible.








Octalink V1 Spline




Shimano Octalink V1 - Shop For Them Here
Original Shimano 8-spline pipe spindle. For Dura Ace 7700, Ultegra 6500, 105 5500, and XTR 950-952 cranks.






Octalink V2 Spline


Shimano Octalink V2 - Shop For Them Here
Shimano 8-spline. Fits following crank models: XT M751-752, LX M571-572, Deore M510-8, M445 and M440-8.







JIS Square Taper (Shimano)ISO Square Taper (Campagnolo)

ISO and JIS Square Taper - Shop For Them Here
The bottom bracket design that fit most cranks from 2000 and earlier. Two major styles of square taper bottom brackets are:

1. Japanese International Standard "JIS" (Shimano compatible)
2. International Organization for Standardization "ISO" (Campy)

While both use a 2 degree taper, the Campy (ISO) spindle starts and finishes smaller than a Shimano (JIS). Therefore, the JIS and ISO bottom brackets are not compatible with each other and must be matched with a compatible crank or you risk damaging the crank arm.



Internal Press-In Bottom Brackets on next page...