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The Last and Greatest Vintage Bicycle Mystery, Can you answer me this?

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The Last and Greatest Vintage Bicycle Mystery, Can you answer me this?

Old 06-25-18, 08:41 PM
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uncle uncle
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The Last and Greatest Vintage Bicycle Mystery, Can you answer me this?

Why did the chain guards on cheap 10 speed bicycles, with cheap cranksets, have bright orange headed mounting bolts? What was the purpose of "orange headed bolts"?

Last edited by uncle uncle; 06-25-18 at 08:45 PM.
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Old 06-25-18, 10:23 PM
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-----

AFAIK this was only done by Takagi (Three Arrows), a Shimano brand.

​​​​​​​-----
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Old 06-25-18, 10:47 PM
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Why? if the cranks spin fast enough one sees an orange circle. The Stargate opens.
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Old 06-25-18, 11:08 PM
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@uncle uncle, I've never seen what you're referring to. Do you mean "bash guard" rings mounted on the outer ring of a double or traditional chain guards mounted to the frame?
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Old 06-25-18, 11:49 PM
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Old 06-26-18, 03:46 AM
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Why did the chain guards on cheap 10 speed bicycles, with cheap cranksets, have bright orange headed mounting bolts? What was the purpose of "orange headed bolts"?
Cosmetics to draw the buyer's eye, would be my guess. Same reason why Campy put a glass bobble in a set of brake calipers - to draw the eye, same as these wheels on this SS/Fixed Gear...


Needless to say, the bright orange does nothing to add to the ride quality. But the wheels DO attract immediate attention. For me, the proof of that statement lies in my wife's reaction to the above bike when I brought it home. She wanted to know where the wheels came from. Believe it or not, it took me several minutes to help her understand that the wheels came with the bike. The point is, she noticed the wheels first and foremost, after which, she saw the bike.

And eye candy works for me, too. I love my Rabeneick 120d simply because of the fancy chrome plated head tube lugs. Eye candy with absolutely no functional purpose, but the vision worked for me and I bought the frame set...
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Old 06-26-18, 06:21 AM
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Originally Posted by Lascauxcaveman View Post
I've never seen what you're referring to. Do you mean "bash guard" rings mounted on the outer ring of a double or traditional chain guards mounted to the frame?
Yeah, maybe "bash guard" is a more appropriate description.... I always thought those rings were to keep your chain from skipping past the big ring.
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Old 06-26-18, 10:29 AM
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I always thought those orange headed bolts were ugly, so it's a decent question. My guess is that @randyjawa's guess is right.
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Old 06-26-18, 11:20 AM
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??? Maxy crank influence??? This is 70s. But no bash guard, or none mounted when acquired,

unrelated, but the flipper did justice
to the shiny rear wheel pie plate.



Last edited by Wildwood; 06-26-18 at 11:31 AM.
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Old 06-26-18, 11:36 AM
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And i’m With @randyjawa that chrome headlugs are a headturner for me!!!



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Old 06-26-18, 11:40 AM
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Fashion: Dayglo was in as part of the Psychedelic color palate of the late '60's
It was everywhere for a brief while w/ consumer industrial design late in it's adoption when it was lame, no longer Hip.

https://athenae25.files.wordpress.co...ears-front.jpg

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Old 06-26-18, 12:07 PM
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I most wholeheartedly third that fancy chrome lug draw! It's the cat's!!
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Old 06-26-18, 12:20 PM
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Originally Posted by juvela View Post
-----AFAIK this was only done by Takagi (Three Arrows), a Shimano brand.​​​​​​​-----
I seem to recall that Takagi was an independent subcontractor that made cranks for Shimano (as Sugino did for SunTour), which was later merged into Shimano when they consolidated their various operations under one roof.

As far as the red pins/ dust caps are concerned, the Maxy path might be worth considering as a little homage to the red dust caps of Maxi-Car hubs. Maybe the day-glo color made the bolts easier to see in dim light-- or on the grey concrete floors of a bike shop?

The Japanese are a very practical people at heart, so there's likely a very practical reason for this... somewhere... written down on a yellowed piece of company paper, stuffed into a dusty filing cabinet in a dead-storage facility on the outskirts of Osaka.

-

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Old 06-26-18, 03:05 PM
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Yes, love the chrome lugs.

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Old 06-26-18, 03:35 PM
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There's a notation of "red bolt ... with round chain guard to order" in the scan in post 5. Maybe the bolts to accomodate the bash guard are slightly longer. And I'll bet the difference in length was so slight, that they made the longer bolts red-headed to provide a visual clue for selecting the correct bolt for the application. Just a possibility....
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Old 06-26-18, 04:26 PM
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Yowza, that bike's so hot I need to wear sunglasses just to look at it.
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Old 06-26-18, 08:21 PM
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Originally Posted by madpogue View Post
There's a notation of "red bolt ... with round chain guard to order" in the scan in post 5. Maybe the bolts to accomodate the bash guard are slightly longer. And I'll bet the difference in length was so slight, that they made the longer bolts red-headed to provide a visual clue for selecting the correct bolt for the application. Just a possibility....
When I was a kid, I thought the orange bolts meant that if I were ever to take them off, there was no way I'd ever get them back on... where I got this idea, I haven't a clue. But, the slightly longer grip length, to make up for the additional thickness of the bash guard... hmm... you might have something there.
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Old 06-27-18, 05:13 AM
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Originally Posted by uncle uncle View Post
When I was a kid, I thought the orange bolts meant that if I were ever to take them off, there was no way I'd ever get them back on... where I got this idea, I haven't a clue.
Ha! I love stuff like that. In my neighborhood fenders made you slow, tires had to be rock hard (my best friend's dad had an air compressor. I am surprised none of us ever had a tire blow off the rim) and you had get the chain as tight as possible when you replaced the back wheel. I remember finding sticks to use a lever between the seat tube and the (rock hard) rear tire to push it back while another friend tightened it.
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Old 06-27-18, 09:28 AM
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One related thing I can think of was that removing the pant leg protector from one-piece Schwinn cranksets didn't allow the bolts to tighten fully, unless small washers were used onder the bolt heads.

This seemed strange, but it was the limited length of the threading. Perhaps the bolts must not protrude from the inner side lest they snag a derailed chain and lead to destruction (something I've seen the likes of on other bikes).

So maybe orange was a designator of bolt dimensions after all. Good call!
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Old 06-27-18, 09:31 AM
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I recall that some cheaper first-gen Centurions (LeMans for one) also had the day-glo stickers (or paint) on their plain chrome steel crankset bolts...or at least that's what I recall. Maybe those were Takagi products but IIRC the LeMans did NOT come with Shimano drivetrains.
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