Chain Ring Bolt Dimensional Differences

David White said:

I have just stumbled into the fact that there is great variation +-
almost .5mm in the gap measured inside fully closed double chainring
bolts. I found this as some bolts I was using to assemble a crank simply
would not cinch up all the way (although they could not be tightened any
further). At first I though this might be because I have some bolts from
older 5-6-7 speed cranks lying around and maybe got them mixed in. But I
checked some old Campy bolts and they are even smaller across the gap
than some brand new Nashbar ones I just got. So is there any difference
by age and, if so, why? Thanks.

We've received substitute 'house brand' chainring bolts occasionally
when our supplier is out of genuine Sugino hardware. And yes, we've
noticed they can be dysfunctionally over/under sized. Do what we do-
return them and demand genuine Sugino or Campagnolo or Shimano hardware.

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

"A Muzi" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

David White said:

I have just stumbled into the fact that there is great variation +-
almost .5mm in the gap measured inside fully closed double chainring
bolts. I found this as some bolts I was using to assemble a crank

simply

Quoted message said:

Quoted message said:

would not cinch up all the way (although they could not be tightened

any

Quoted message said:

Quoted message said:

further). At first I though this might be because I have some bolts

from

Quoted message said:

Quoted message said:

older 5-6-7 speed cranks lying around and maybe got them mixed in.

But I

Quoted message said:

Quoted message said:

checked some old Campy bolts and they are even smaller across the

gap

Quoted message said:

Quoted message said:

than some brand new Nashbar ones I just got. So is there any

difference

Quoted message said:

Quoted message said:

by age and, if so, why? Thanks.

We've received substitute 'house brand' chainring bolts occasionally
when our supplier is out of genuine Sugino hardware. And yes, we've
noticed they can be dysfunctionally over/under sized. Do what we do-
return them and demand genuine Sugino or Campagnolo or Shimano

hardware.

Quoted message said:

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

Also the cheaper ones are frequently poorly plated and don't thread
together well.

Years ago, Sugino CR bolts were pretty poorly made. You could use them
in a Campy or Stronglight crank in a pinch but....

I just picked up a bag of Sugino CR bolts for a project bike and they
all look pretty nice.

Chas.