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Old 11-04-09, 06:44 PM   #1
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Avid BB5 Rear mounting.

Hi, I just recently bought a set off Avid bb5's and im having an issue finding out what size adapter i need to mount the rear caliper.

I have a 1998 A50r frame. Im not sure if the mounting holes are international size or what. Heres a picture...

http://img94.imageshack.us/img94/476...0283519315.jpg

Those two holes are smaller than the adapter the BB5's came with and looks to be about an a half inch shorter than the avid adapter

Sorry for how crappy it is. Only camera i had was my DSi.

Any help?

Last edited by 082; 11-04-09 at 07:31 PM.
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Old 11-04-09, 08:58 PM   #2
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Are you the nurd that outbid me on eBay?!!

Here's what you need.


Or this
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Old 11-04-09, 09:00 PM   #3
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See this thread also.

And this website...key word: DM-UNI
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Old 11-04-09, 09:03 PM   #4
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The photo is less than worthless... but it sounds like a 22mm Hayes chainstay mount. Adapters are available, but they won't fit smaller frames.
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Old 11-04-09, 09:10 PM   #5
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The photo is less than worthless... but it sounds like a 22mm Hayes chainstay mount. Adapters are available, but they won't fit smaller frames.
Those holes are for a freakin' rack'n'panniers, man
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Old 11-04-09, 09:27 PM   #6
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Those holes are for a freakin' rack'n'panniers, man
rack n panniers? Thanks for your help. Im just going to assume im screwed.
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Old 11-04-09, 09:30 PM   #7
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rack n panniers? Thanks for your help. Im just going to assume im screwed.
Did you click the links I posted? You're completely not screwed. Click my links, buy the adapter, and mount your disc.
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Old 11-04-09, 09:38 PM   #8
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Those holes are for a freakin' rack'n'panniers, man
You're probably right, but based on the really lousy photo, it's hard to tell what we're up against.
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Old 11-04-09, 10:22 PM   #9
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True dat!
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Old 11-04-09, 10:25 PM   #10
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This might help. And i apologize for forum clutter

Need help finding adapter.
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Old 11-04-09, 11:54 PM   #11
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You're probably right, but based on the really lousy photo, it's hard to tell what we're up against.
I know what you were thinking of: the 22mm chainstay disc mount holes. But I adjusted the shadow level in Photoshop to see it. They are rack mount holes on the flat of the dropout. Ed's advice holds.
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