73mm bottom bracket

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73mm bottom bracket
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flag Vaggelis
Posted: Oct 20, 2017 at 16:44 Quote
Hello,
I am looking for 73mm bottom bracket but I dont know which one to choose. Also what are the diffirences between europe bb and mid
Thank you
flag adrennan
O+ FL
Posted: Oct 23, 2017 at 11:46 Quote
depends on the cranks you are planning on fitting for which bb you need. euro is threaded and mid is "pressed in" (most people seem to just hammer in mid bb)
flag cmc4130
Posted: Oct 23, 2017 at 13:15 Quote
What crankset do you currently have?

Note these options:
https://www.profileracing.com/product-category/profile-bmx/profile-bottom-brackets/

photo

73mm wide bottom bracket shell:
photo

Mid and Spanish bottom bracket shells do not have threading inside the shell:
photo

The Odyssey Euro internal bottom bracket https://www.niagaracycle.com/categories/odyssey-19mm-euro-bottom-bracket-cup-bearing-set has cups that screw inside the bottom bracket shell (so the bearings are inside the shell). An "external" or "outboard" Euro bottom bracket will have the bearings outside the shell.
Odyssey Euro Internal bottom bracket: (note that it comes with a tube spacer for a 68mm bb shell)
photo
photo

An external euro bottom bracket has the bearings outside the shell (they are inside the gold cups in this photo):
photo
flag Vaggelis
Posted: Oct 29, 2017 at 12:27 Quote
cmc4130 wrote:
What crankset do you currently have?

Note these options:
https://www.profileracing.com/product-category/profile-bmx/profile-bottom-brackets/

photo

73mm wide bottom bracket shell:
photo

Mid and Spanish bottom bracket shells do not have threading inside the shell:
photo

The Odyssey Euro internal bottom bracket https://www.niagaracycle.com/categories/odyssey-19mm-euro-bottom-bracket-cup-bearing-set has cups that screw inside the bottom bracket shell (so the bearings are inside the shell). An "external" or "outboard" Euro bottom bracket will have the bearings outside the shell.
Odyssey Euro Internal bottom bracket: (note that it comes with a tube spacer for a 68mm bb shell)
photo
photo

An external euro bottom bracket has the bearings outside the shell (they are inside the gold cups in this photo):
photo
I have http://www.vitalmtb.com/product/guide/Cranks,17/Atomlab/G-I-Crankset,9571
flag Aaronz25RS
Posted: Oct 30, 2017 at 9:06 Quote
cmc4130 wrote:
Mid and Spanish bottom bracket shells do not have threading inside the shell:
photo

That Ordnance BB is a thing of beauty
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