NINER ENCYCLOPEDIA
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SPECIFICATION & SETUP GUIDE
44
: Updated: SEPT 5, 2012
bb SYSTEm
CYA INSERT
bOTTOm bRACkET
ExAmPLE PHOTO
NOTES & COmPATIbILITY ISSUES
BB30
NINER PART #
49-134-10-00-20
C-CLIPS NOT NECESSARY
FOR BB INSTALLATION
Compatible with all BB30 (30mm spindle) style cranks and bearings. Press CYA
Inserts into frame, then install BB bearings as per manufactures recommendations,
Do not use C-Clips that are supplied with bottom bracket. Install cranks per
manufacturers instructions. NOTE: Do not confuse BB30 with SRAM Press Fit
30. The outer diameter of the BB bearings is different, so you must use the
corresponding CYA cups.
SHIMANO BB92
SRAM BB92
NINER PART #
49-135-10-00-20
BB89.5 AND BB92 ARE
THE SAME STANDARD.
BOTTOM BRACKETS
COME WITH 2.5MM
SPACER TO BE INSTALLED
ON THE DRIVESIDE TO
CONVERT BB89.5 TO BB92
STANDARD
Shimano MTB Press Fit Bottom Bracket for 92 or 89.5mm for Shimano HollowTech II
MTB cranks. Set includes left and right hand cups, 2.5 mm spacer, inner cover, and
inner O-rings. Compatible with 89.5 mm (with 2.5 mm spacer) and 92 mm shells.
41mm cup outer diameter. For cranks with integrated 24mm spindle. NOTE: These
cups should be referred to as BB92 or BB89.5, which references the BB shell width
(CYA cups are 89.5). BB90 is used exclusively on Trek frames where the bearing
seats are molded directly into the carbon BB shell.
For use on HollowTech-II cranks with integrated 24mm HT2 spindle. Press CYA
Inserts into frame, then install Shimano BB and cranks per manufacturer’s
instructions.
Truvativ/SRAM Press-Fit BB86/92 GXP Adapter Cups: For fitting SRAM and Truvativ
GXP cranksets to frames with either a BB86-Road (86.5mm width) or BB92-MTB
(89.5/92mm width) 41mm-ID press-fit, non-threaded bottom bracket shells (not
for BB90-Trek, or BB30 systems). Includes 37x24x8mm bearing set with wave
washer and bearing shields for use on Giga X Pipe cranks with integrated 24mm
GXP spindle.
The same CYA cups as above, but shown with the SRAM Press-Fit BB86/92 GXP
Adapter Cups. For use with SRAM and Truvativ GXP cranksets. Press CYA Inserts
into frame, then install GXP cups and cranks per manufactures instructions.
SRAM pRESS FIT
30BB
NINER PART #
49-133-10-00-20
Compatible with all BB30 style cranks (30mm spindle) and SRAM PF30 BB. Press
CYA Inserts into frame, then install PF30 cups and cranks per manufactures
instructions. NOTE: Do not confuse BB30 with SRAM Press Fit 30. The outer
diameter of the BB bearings is different, so you must use the corresponding CYA
cups.
STANDARD
THREADED
BB SySTEMS
(EXTERNAl)
ACCEPTS ANY 73MM WIDTH
ENGLISH THREADED
EXTERNAL BEARING
BB SYSTEM.
SHIMANO,
CHRIS KING, ETC.
NINER PART #
49-132-10-00-20
NOTE: Niner bikes does not recommend SRAM threaded GXP bottom brackets with
the CYA system, they are not compatible. The BB92 insert is compatible with these
cranksets, see above.
Call Niner Customer Service with any questions related to this recommendation.
1.877.NINERXC
NINER BIOCENTRIC
NINER PART #
Black 49-131-09-00-20
Blue 49-131-09-00-80
Red 49-131-09-00-40
Silver 49-131-09-00-10
NINER RECOMMENDS AN EXTERNAL BEARING BOTTOM BRACKET SYSTEM WITH
THE BIOCENTRIC.
DON’T FORGET THE SPECIAL CYA INSERT REMOVAL
TOOL, AVAILABLE FROM NINER. DO NOT ATTEMPT
TO REMOVE CYA INSERT WITHOUT THIS TOOL.
CYA IDENTIFICATION GUIDE
