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Is this accurate?
It's in the ball park, different manufacturers have different recommendations, but for carbon 1⅛" steerers they congregate around 40-50mm maximum under the stem. Some heavy duty steel forks are designed for more. The load case depends on factors such as stem length and angle, bar width and degree of rider hench.
gbj_tester
@Crop
Spacer stacks
Had somebody tell me the other day that most manufacturers recommend no more than 4.5cm stack.
Is this accurate? Is there an advised maximum?
I'm guessing there are some variables to take in to consideration such as the construction method of the frame as well as the size of the headtube.