Join Date: Aug 2006
Location: Long Island
Bikes: 2006 Cannondale CAAD8
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From sheldon brown and google images.
Hollowtech II/integrated bottom bracket/external bearings
"The two-piece crank /bottom bracket system introduced with the 2004 10-speed Dura-Ace line. These use external bearings that hang outboard from the bottom bracket shell."
(International Spline Interface Standard)
"When Shimano introduced its proprietary Octalink splined bottom bracket system, a group of other manufacturers got together to produce their own competitive splined system. This became ISIS. ISIS cranks and bottom brackets only work with each other, as do other splined systems. "
cartridge bottom bracket
"Bearings which are assembled in a modular unit, as opposed to cup-and-cone bearings, which may be disassembled down to the individual bearing balls for service.
Cartridge bearings are the only type of ball bearings used in most industrial products; bicycle technology is the major area where cup-and-cone bearings still survive, but they are in decline even in the bicycle industry. ******* A conventional cup-and-cone bottom bracket.
The lock ring wrench is about to loosen the lockring, the pin wrench is engaging two of the holes in the adjustable cup
A cartridge bottom bracket. The splined tool is shown above the bottom bracket. The crank would need to be removed to actually use the tool. "