T47 BB 68mm inboard or outboard?
Moderator: robbosmans
The distance between the crank bearing journals and the frame shell width determines if bearings are inboard or outboard. For example, a BB30 crank on a 68 mm wide frame uses inboard bearings whereas SRAM DUB, with its wider bearing stance, needs outboard. I don't know about Campag UT, but I suspect it will use outboard bearings on a 68 mm wide frame with inboard bearing being used with wider frame standards like BB386EVO.
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Outboard BB for T47 68mm bottom bracket shell
It's a fairly new standard, and got some popularity only recently. Next gen Campy road group should/will be compatible with T47.
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I personally prefer 68mm bb shell with outbard bb for easier installation. The contact area between bb cup and tool is simply too small for 86 internal. I can forsee difficulty removing the bb after a year or two.
I have a version of it on my C64 and you have to be careful. I put a piece of polythene bag between tool and cup. Doesn't help that the tool is plastic.I also use Park Anti seize. Came out okay after a year.ipenguinking wrote: ↑Tue Dec 07, 2021 6:15 pmI personally prefer 68mm bb shell with outbard bb for easier installation. The contact area between bb cup and tool is simply too small for 86 internal. I can forsee difficulty removing the bb after a year or two.
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Anyone sees potential compatibility and chainline problem with the following combo?
--Frame is a custom titanium with T47 68mm bottom bracket shell
--DA 9200 group
--Power2Max NG Rotor ALDHU Carbon 30mm 4-bolt Shimano
--Rotor Aero 110x4 Roung Rings 2x (or 9100 rings)
--Wheel Mfg T47 Outboard BB for 30mm Cranks
--Frame is a custom titanium with T47 68mm bottom bracket shell
--DA 9200 group
--Power2Max NG Rotor ALDHU Carbon 30mm 4-bolt Shimano
--Rotor Aero 110x4 Roung Rings 2x (or 9100 rings)
--Wheel Mfg T47 Outboard BB for 30mm Cranks
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What frame is it (just to satisfy my curiousity).ipenguinking wrote: ↑Fri Dec 10, 2021 3:42 amAnyone sees potential compatibility and chainline problem with the following combo?
--Frame is a custom titanium with T47 68mm bottom bracket shell
--DA 9200 group
--Power2Max NG Rotor ALDHU Carbon 30mm 4-bolt Shimano
--Rotor Aero 110x4 Roung Rings 2x (or 9100 rings)
--Wheel Mfg T47 Outboard BB for 30mm Cranks
Why would there be an issue with chainline?
You use disc brakes you go for the longer axle for Aldhu.
Bikes:
Ax Lightness Vial EVO Race (2019.01.03)
Open *UP* (2016.04.14)
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Ax Lightness Vial EVO Race (2019.01.03)
Open *UP* (2016.04.14)
Paduano Racing Fidia (kind of shelved)
Ex bike; Vial EVO D, Vial EVO Ultra, Scott Foil, Paduano ti bike.
https://youtu.be/rTNm-YPkeOc This may help answer your question. At least a little.
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