Bike Forums - View Single Post - Specialized Roubaix have a BB30?

01-05-12 | 11:56 AM

#23

Grasschopper

He drop me

Joined: Jul 2004

Posts: 11,664

Likes: 13

From: Central PA

Bikes: '03 Marin Mill Valley, '02 Eddy Merckx Corsa 0.1, '12 Giant Defy Advance, '20 Giant Revolt 1, '20 Giant Defy Advanced Pro 1, some random 6KU fixie

Quote:

Originally Posted by xfimpg

This is painful. I'm about to ask someone to take me out back and shoot me. Just not in the face, please; what if you miss?

This is a close up of the Roubaix Pro osbb area. I don't see an "indent" where the bearings will stay put for the Shimano 105 crankset, so I'm thinking I need
- to install a Shimano press fit
- then install the bearings
- then install the Wheels Mft. bb30 adapter kit.

Am I close?

Actually I don't think...sorry.

The frame pictured is 68mm English threaded. Currently if you buy a Roubaix SL3 Pro frameset you will get a threaded BB...if you buy the S-Works frameset you will get OSBB. The SRAM RED Pro and DA Pro SL3 non S-Works models for 2012 DO have OSBB...but the Ultegra model is threaded.

Personally if I had a OSBB frame I would run a BB30 crankset and not try to adapt it back to threaded for Shimano or Campy cranks with 24mm spindles.

IF I was going to run a Shimano crankset I would go with an adapter more like this one (shown above by M_Wales): http://fairwheelbikes.com/parlee-bb3...et-p-4500.html or this one: http://fairwheelbikes.com/kcnc-bb30-...et-p-2926.html

I don't like the WheelsMfg concept of an adapter in the BB30 bearings. This style presses in and then houses the bearings (sort of like what PF30 is).

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Last edited by Grasschopper; 01-05-12 at 12:02 PM.

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