I want to convert from mtb cranks to bmx cranks on my dirt jumper what type of bottom bracket should I get?
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convert cranks
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Joined: 12/19/2011
Location: Newbury Park, CA USA
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let us know what model and year bike you have and we'll be able to help.
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Location: Santa Cruz, CA USA
Moderator
Any "Euro" BMX BB should work as long as the axle fits the bearings. Most are the standard 19mm size.
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Joined: 12/19/2011
Location: Newbury Park, CA USA
ok cool ya my cranks are 19mm and i have the kona shred
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Joined: 2/1/2011
Location: Santa Cruz, CA USA
Moderator
So check Dan's Comp and get any "Euro" BB you fancy. The only other issue you might run into is the length of the BB spindle/axle. You need frame clearance for the gearing and AT LEAST go half way through each crank arm, though it's best to have much more. Profile makes a few different lengths. The standard BMX length of 5 5/8? usually wont work.
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