Niner CYA GXP Compatibility: Read the Threaded-Bearing Exception
Niner CYA GXP compatibility is more specific than saying that a frame accepts an English-threaded bottom bracket. The historical CYA table explicitly excludes SRAM threaded GXP bottom brackets from that arrangement, while describing another route for the cranksets. Read both statements before deciding that the crank name alone identifies the bearing unit.
Read the Niner CYA GXP compatibility exception
Printed page 58 of Niner’s Encyclopedia, updated 16 June 2013, lists separate CYA inserts for several bottom-bracket systems. Its standard threaded external-bearing row identifies insert 49-132-10-00-20 and describes 73 mm English-threaded applications.
The same row carries an explicit exception: Niner says SRAM threaded GXP bottom brackets are not compatible with the CYA system. Preserve that exclusion when a seller summarizes the insert as accepting threaded external bearings. A general row label does not cancel its more specific restriction.
The crankset and its bearing assembly are separate choices
The table then directs GXP crankset users to the BB92-insert entry above. That entry identifies CYA insert 49-135-10-00-20 and illustrates the corresponding SRAM/Truvativ press-fit GXP adapter-cup arrangement. It is a different bearing-and-insert path, rather than permission to install the excluded threaded unit.
This distinction explains why “GXP fits” is an incomplete parts description. The mechanic needs the exact crankset, proposed bearing unit and CYA insert, together with the identified frame. Copy the applicable combination from the dated table rather than combining the convenient half of one row with another.
Keep this a historical CYA enquiry
The guide concerns frames equipped for this insert system. Do not transfer its part numbers to a later Niner simply because its bottom bracket also uses a familiar acronym. The actual frame and installed insert remain the starting evidence, particularly where previous work is unknown.
The page also calls for Niner’s dedicated insert-removal tool. Avoid forcing out an unidentified insert to check a guess. Ask a suitable workshop to identify the assembly, assess its condition and confirm the complete replacement path and current parts availability before ordering.
FAQ
Does an English-threaded CYA insert approve threaded GXP?
No. The historical table expressly excludes SRAM threaded GXP bottom brackets from this arrangement.
Does that exclude every GXP crankset from CYA?
No. The same table describes the separate BB92-insert and suitable press-fit GXP bearing path.
Can the old part number prove present supply?
No. It identifies the documented component; a supplier must confirm availability and the actual compatible combination.
Keep the exclusion and the alternate documented route together when discussing a CYA build. The Niner topic and brand introduction provide the wider bicycle context.
Primary references: official reference 1 (https://www.ninerbikes.com/media/productattach/n/i/nin_owners_univers.pdf)
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Photograph 1
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