BB30 compatibility question
09-17-16 | 10:11 AM
#1
Thread Starter
Newbie
Joined: Sep 2016
Posts: 3
Likes: 0
From: Newtown Square, PA
Bikes: 2016 Specialized Diverge carbon comp
BB30 compatibility question
I purchased a SRAM BB30 Rival 22 Yaw Crankset to install in a 2008 Cannondale Supersix BB30 bottom bracket. It will not go into the Cannondale BB30 bottom bracket bearings. Do I need a SRAM BB30 Bottom Bracket Assembly. Is it compatible?
09-17-16 | 11:04 AM
#2
Senior Member
Joined: Jan 2015
Posts: 443
Likes: 23
Check one or both of the bearings are not crooked in the shell. They should be pushed up flat against the circlip ring that's behind the bearing.
It should go in. Apply a generous amount of grease to the spindle and bearing surfaces. Then if it's still a tight fit use a soft hammer to gently tap it in.
All BB30 bearings are the same size 42x30x7mm regardless of brand. The Sram bearings are no different to any other.
It should go in. Apply a generous amount of grease to the spindle and bearing surfaces. Then if it's still a tight fit use a soft hammer to gently tap it in.
All BB30 bearings are the same size 42x30x7mm regardless of brand. The Sram bearings are no different to any other.
Last edited by trailflow1; 09-17-16 at 11:07 AM.
09-17-16 | 10:06 PM
#4
Senior Member
Joined: Dec 2009
Posts: 28,682
Likes: 63
From: Houston, TX
Bikes: 1990 Romic Reynolds 531 custom build, Merlin Works CR Ti custom build, super light Workswell 066 custom build
BB30 is BB30. Is either your bottom bracket or your crank actually BB30A or wider than standard BB30? Sometimes a crank has to be coaxed into the bearings, and a mallet and grease can help. Keep the mallet clear of the chain rings or you can bend them.
09-18-16 | 06:46 PM
#5
Senior Member
Joined: Feb 2008
Posts: 2,149
Likes: 76
From: Arlington, VA USA
BB30A wouldn't make a diffrence in the spindle getting through the bearings, it just allows you to use cranks with both 68 and 73mm shells so you would need correct spacers depending on you BB shell. The spindle is the same width either way and the bearings are the same. I have a SRAM Red 22 crankset on my BB30. it works great, but I did have to tap it a bit to get it through the bearings the first time
09-19-16 | 06:21 AM
#6
Senior Member
Joined: Dec 2009
Posts: 28,682
Likes: 63
From: Houston, TX
Bikes: 1990 Romic Reynolds 531 custom build, Merlin Works CR Ti custom build, super light Workswell 066 custom build
BB30A wouldn't make a diffrence in the spindle getting through the bearings, it just allows you to use cranks with both 68 and 73mm shells so you would need correct spacers depending on you BB shell. The spindle is the same width either way and the bearings are the same. I have a SRAM Red 22 crankset on my BB30. it works great, but I did have to tap it a bit to get it through the bearings the first time
09-19-16 | 11:04 PM
#8
Thread Starter
Newbie
Joined: Sep 2016
Posts: 3
Likes: 0
From: Newtown Square, PA
Bikes: 2016 Specialized Diverge carbon comp
BB30 compatibility question
I finally had time to install the BB. Followed your instructions and all went well. I had to use a rubber mallet to get it started then it just slide in the rest of the way. I can't tell you how much your advice helped me install my first BB. Thanks to everyone again I really appreciate it.
09-19-16 | 11:19 PM
#9
Member
Joined: Jan 2014
Posts: 37
Likes: 0
From: Sydney NSW
Bikes: Felt AR1, Felt B2
I finally had time to install the BB. Followed your instructions and all went well. I had to use a rubber mallet to get it started then it just slide in the rest of the way. I can't tell you how much your advice helped me install my first BB. Thanks to everyone again I really appreciate it.
Did you check one of the bearings wasn't slightly crooked? I would hate for you to be riding around with a slightly off bearing that causes issues later on to your frame.
Talking from a complete novice who just installed his first BB30 crankset recently nights ago.
