This is making no sense to me. I just got a GXP BB and Omnium crankset in the mail. I threw them on the frame today, but the only way I could make the crankset fit together was by threading the cup marked "Non-Drive Side BSA" onto the drive side of the bike. Are the cups just marked wrong, or what? Here's some photos.

NDS cup marking and bearing:


NDS Cup by yummygooey, on Flickr


NDS Bearing by yummygooey, on Flickr

DS cup marking and bearing:


DS Cup by yummygooey, on Flickr


DS Bearing by yummygooey, on Flickr

I feel like the markings on the cups are backwards of what they should be. There is no way I can shove the Omnium drive side crank arm post tube thingy into the "Drive Side BSA" bearing. It does not fit. But it fits and slides nice and snugly into the "Non-Drive Side BSA" bearing.

Also, the "Drive Side BSA" cup doesn't even thread onto my bike's drive side BB shell. I tried, and I'm pretty sure I got cross threading.

What's the deal?

P.S. Pardon the grease everywhere. My camera does not take flattering pictures.

P.S.S. Here's a picture of the chainring arm/chainstay clearance. Tight.


Omnium Clearance by yummygooey, on Flickr

That's pretty crazy.. I just reinstalled my Omniums yesterday and they went on just fine. I would say they just have the markings wrong?!?!

Does your "Drive Side BSA" cup bearings look like mine?

This is really strange. Maybe that's why I got a good deal on it, haha.

Ask in mechanics forum.

Any pics of them on the bike?

What frame is it?

It is a TET track frame. I don't have any grease (left it/everything at school), so I don't want to push my luck on continuing to dry thread these parts on.

answered in your other post.

Here's a link to the other post:

https://www.bikeforums.net/showthread...B-Installation

hey man i just pulled my cranks off and those marks on your bearing are definately crossed. your nds bearing looks exactly like my drive side bearing.

edit: nevermind.

Thanks for checking for me.

I'm not too worried as long as it still works.

I think it's safe to use the "NDS" cups on the DS and vice versa.





And I'm just stating what you have said before.

Thank you for your contribution and affirmation of aforementioned discoveries, oh wise Vixtor!!

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