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Join Date: May 2002
Location: Washington D.C.
Bikes: Giant TCR Advanced SL, Blue T-14 TT bike
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New SRAM Rival bottom bracket scraping noise (video), ideas?
I'm preparing to install SRAM Rival group on new bike. This is my second Rival crankset. The first, on my other bike, installed with no problems. BB quiet as a mouse.
As you'll see in the video, when spun there is a scraping noise. Same noise also present when crankset fully installed and torqued to spec.
I've wiped and re-greased the bearing surfaces, there was a bit of grit present. This is a brand new group.
Also: The manual states there are two bearing seals -- one for each side. The drive side one is obviously present. The non-drive side one doesn't appear to be there (see pic). I received the bb as you see it in the pics.
I have the see-through plastic center piece (with gxp logo) installed so the fatter lip is mated with the drive side cup.
Any ideas on how I can troubleshoot this scraping noise? Thanks.