Would someone be able to do the math on this rocket science frame question.

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1/23/2020 1:18 PM

Blank Grizzly 3's bottom bracket height, I'm trying to figure it out. They are saying that it has a 43mm bb drop. What does that workout to in regular bbh mathematical terms? 11.5, 75 etc ?

Thanks in advance boys !

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Francky

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1/23/2020 1:53 PM

Huuuh, on about every bike there’s some kind of BB drop, but in bmx bb is over the axles so a 11.5” BB is 1.5” over the axles (3,8 cm), plus 10” for a theorical half wheel (wheels are closer to 21” nowadays with fat tyres).

1.7” is about 4.3 cm so I guess the bike have an 11.7” BB height.

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Cellmember

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1/23/2020 1:58 PM

Francky wrote:
Huuuh, on about every bike there’s some kind of BB drop, but in bmx bb is over the axles so a 11.5” BB is 1.5” over the axles (3,8 cm), plus 10” for a theorical half wheel (wheels are closer to 21” nowadays with fat tyres).

1.7” is about 4.3 cm so I guess the bike have an 11.7” BB height.

Thanks for that info Francky, just what I needed, appreciate it man !

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