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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Profile chainring bolt size
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Author Topic: Profile chainring bolt size  (Read 575 times)

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Offline TwoBobRob

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Profile chainring bolt size
« on: February 10, 2008, 11:25 PM »
.... can anyone tell me specifically what size the bolt is?   I know its a 7/16" buttonhead bolt, but is it coarse or fine thread - can anyone tell me for certain?

Or is it some wierdo cycle spec thread?

Cheers

Rob



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Offline MartyC

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Re: Profile chainring bolt size
« Reply #1 on: February 10, 2008, 11:26 PM »
Rob, given it's US made and will be an Imperial size it's probably coarse thread  :daumenhoch:
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Offline TwoBobRob

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Re: Profile chainring bolt size
« Reply #2 on: February 10, 2008, 11:30 PM »
It does look like it is coarse.  Just wanted to see if anyone knew for deffo as I need to buy a longer version, so it's not going to come from a bike shop...
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BigassBMX

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Re: Profile chainring bolt size
« Reply #3 on: February 11, 2008, 07:50 AM »
ite rob.

how long do u need it man coz i think i mite have 1 here.
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Offline TwoBobRob

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Re: Profile chainring bolt size
« Reply #4 on: February 11, 2008, 09:16 PM »
I need it to be double the length of a regular one, so about 1"  (25mm).  I've had to space the crank arm out a mile on my shiity cruiser.......  :(
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Offline lazychubs

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Re: Profile chainring bolt size
« Reply #5 on: February 11, 2008, 10:58 PM »
rob i also have one but cant measure at the mo as need to find tape measure lol
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