Hollowtech

Is a Hollowtech II BB compatible with an Octalink Crank? (Shimano Claris)
No, you cannot, they are fundamentally different. Octalink uses a 3-piece crankset and Hollowtech 2 uses a 2-pice crankset. The 3-piece means that the...
Difference between Road/Mountain Hollowtech II Bottom Brackets?
Road external cranks and their bottom brackets don't use any spacers between the cups and the shell. Mountain external cranks have longer spindles and...
Can I use Shimano Ultegra 6800 BBR60 Bottom Bracket on 105 groupset
Are all hollowtech BB the same?What is hollowtech crankset?Does Shimano make a BB30 crankset?Do all cranks fit all bottom brackets?How do I know what ...
How does pedaling power transfer to the bearings in Hollowtech II bottom bracket?
What is the difference between hollowtech and hollowtech 2?How does a bicycle bottom bracket work?What is the difference between hollowtech 1 and 2?Is...
Are Hollowtech II bottom bracket normal?
What is the difference between hollowtech 1 and 2?What is hollowtech II?How long should a hollowtech bottom bracket last?Are all hollowtech BB the sam...
What types of BB-axle to crankarms interfaces are there?
What is the difference between hollowtech and hollowtech 2?What is the difference between hollowtech 1 and 2?Are all hollowtech BB the same?Are all Sh...
Will a hollowtech shimano BB fit a bike which currently has an octalink bracket?
The Hollowtech and Octalink systems are different because you need to match the crankset to the bottom bracket, that is, you cannot use the BB from on...