Hollowtech II: chain line and Q-factor

Hollowtech II is a type of bicycle bottom bracket (BB) manufactured by Shimano. They are very easy to remove and replace, which meant it was also very easy to alter the chain line on my Ridgeback touring bike. It was simply a matter of fitting some spacers in different positions to those indicated in Shimano's [...]

Source: http://cycleseven.org/hollowtech-ii-chain-line-and-q-factor

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