BB90 GXP installation help
04-19-20 | 05:27 PM
#1
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Joined: Oct 2009
Posts: 825
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From: Nor Cal
BB90 GXP installation help
Hi there,
This is my first BB90 frame (Trek Madone). I'm looking to replace the existing bottom bracket (Shimano) with one for GXP so that I can run my Quarq. I don't quite understand all of these pieces. This is a BB90 (road) or BB95 (MTB, I assume) kit.
1. The black plastic piece is an expanding sleeve. It's labeled L and R, so I know the proper orientation, but why is this used?
2. Bottom left looks to be a metal washer/cover for the NDS bearing.
3. Middle is the NDS bearing (22mm ID).
4. Top right Is the DS bearing.
5. Bottom right is wave washer -- does this g on the drive side or non-drive side?
6. Middle right is a 5mm spacer for MTB cranks, I assume. I wont use this.
I can't find any instructions online regarding assembly. I have a headset press and cups, so I'm good on tools...just am not sure about what each part does.
Thanks,
Bob
This is my first BB90 frame (Trek Madone). I'm looking to replace the existing bottom bracket (Shimano) with one for GXP so that I can run my Quarq. I don't quite understand all of these pieces. This is a BB90 (road) or BB95 (MTB, I assume) kit.
1. The black plastic piece is an expanding sleeve. It's labeled L and R, so I know the proper orientation, but why is this used?
2. Bottom left looks to be a metal washer/cover for the NDS bearing.
3. Middle is the NDS bearing (22mm ID).
4. Top right Is the DS bearing.
5. Bottom right is wave washer -- does this g on the drive side or non-drive side?
6. Middle right is a 5mm spacer for MTB cranks, I assume. I wont use this.
I can't find any instructions online regarding assembly. I have a headset press and cups, so I'm good on tools...just am not sure about what each part does.
Thanks,
Bob
