yummygooey

I posted this in SSFG, but was told I should post it here. Cross post!

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

reptilezs

you have a warranty issue. the bearings are in the the wrong cups edit, never mind brain fart. just mis marked cups

yummygooey

Interesting. It's not a big deal, I got a good deal on the set.

Maybe SRAM will give me another BB free of charge.

reptilezs

they might. having some issues with an XO crank and bb at the shop. crank still has play after several removals and installs. they sent another bb because they had a run on out of spec(they switched manufactures) bbs. new bb didnt fix and they are sending another bb. last step is to send the crank back

yummygooey

Ah. Unfortunately, I'm not the original owner and have no proof of purchase (the warranty info on the website says I need to meet both of these requirements), although the crankset is unused. I'm not too concerned if it's just mis-marked cups and things work.

simonaway427

Something is strange here. Look at the arrows indicating the direction for installation....they're backwards.

Drive side is supposed to thread in counter clockwise, whereas NDS supposed to thread clockwise.

yummygooey

The NDS-marked cup does indeed thread onto the DS in a counterclockwise fashion, so the arrows on the NDS-marked cup is right, but the NDS-marked cup is actually the DS cup.

Likewise, the arrow on the DS-marked cup points in a clockwise direction and threads onto the NDS of the bike accordingly.

Summing this all up, the arrows are right, but the labels are wrong.

I should also point out that the NDS-marked cup has the long "shell" part of the BB in addition to the cup. The DS-marked cup is just the cup.

AEO

How is the clearance on the non-drive side?
I think you're missing the toothed washer/dust cap on the non-drive side, not that it will change chainline or anything.

yummygooey

Um. I'm not sure. I left all my tools at school, so I was just dry threading these on to check DS clearance before I got my hopes up about Omniums fitting on my new build. NDS crank arm clearance should be fine if the DS spider clears, right? I've never heard of people having issues with crank arms not clearing a frame...

simonaway427

Marking is definitely backwards. If you go to the SRAM website and look at the installation PDF, the DS is supposed to have the "long shell". The NDS is supposed to be just the cup.

yummygooey

I was actually taking a look at that just now. I looked through it before I tried to install, but I wasn't being particularly attentive to the drawings.