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1981-83 Aerodynamic Bicycles

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1981-83 Aerodynamic Bicycles

Old 10-17-08, 09:36 AM
  #51  
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what's there, about .05mm clearance between rear tire and seat tube?

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Old 10-17-08, 09:53 AM
  #52  
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Originally Posted by lotek View Post
what's there, about .05mm clearance between rear tire and seat tube?

marty
Yeah, but only when the tire is inflated!

They indented the seat tube to accomodate a very short wheel base. I have to be careful turning as the front wheel hits my shoe!

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Old 10-17-08, 10:08 AM
  #53  
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ah, I didn't see the cut out seat tube.
you'll get used to the toe overlap. My worst was starting on a sharp
turn and realizing both my feet were on the same side as the front wheel, yikes!

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Old 10-17-08, 12:36 PM
  #54  
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Originally Posted by guygadois View Post
I'll throw my newly finished aero style bike in the ring...


Great looking bike. Does the rear tire actually clear the tube? Looks so tight you couldn't sneak a piece of paper in there!
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Old 10-17-08, 01:29 PM
  #55  
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Yep... Here are more pics https://www.bikeforums.net/showthread...ght=biemmezeta
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Old 10-18-08, 04:26 AM
  #56  
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There are some excellent photos here of this 1981 Cinelli Laser -

It is owned by Dr. Amaki, a discriminating Japanese bike collector who also found these aero bikes fascinating.
He also owns a couple vintage Rene Herse bikes (of course) and his main passion is vintage Bianchi bikes.

https://members.jcom.home.ne.jp/34169...LI%20LASER.htm

Notice the rear brake on the Laser... mounted within a fairing in back of the bottom bracket shell.
This was a steel bike built before the sleek lines of carbon fiber bike construction was even dreamed of.
The contours behind the head tube were Bondo - and they tended to eventually show cracks... but it sure looks great!
And, no external brake or derailleur cables!



And here is his SHIMANO bike! with full Dura Ace AX.

I suspect this bike was a prototype or a show bike made to advertise the AX component group.

https://members.jcom.home.ne.jp/a.yoshie/dura%20ax.htm

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Old 10-18-08, 11:35 AM
  #57  
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with the much coveted nitto crystemblue stem and adb-x bars
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Old 10-18-08, 12:42 PM
  #58  
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Originally Posted by mugatu View Post
with the much coveted nitto crystemblue stem and adb-x bars
my red bike shown above has a nitto crystem. I have never seen another. Was there blue version?

Guy
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Old 12-24-08, 11:20 AM
  #59  
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Richard Sachs time trial bike from the late 80s

Hi,

Here's my recent evilbay purchase. It is a Richard Sachs time trial bicycle from the late 80's.
It's all steel, fillet brazed from the looks of it. The top tube and down tube are aerodynamic
shaped tubing. 24 inch front wheel, 650c rear. Apparently it is one of five bicycles he built
for his racing team. Thought you guys might want to see it.

cheers,

Osmium
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Old 12-24-08, 12:19 PM
  #60  
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Old 12-24-08, 02:12 PM
  #61  
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Originally Posted by vesperae View Post
i just acquired this aero bike, and was hoping someone here could help identify the frame. i believe it's a medici based on the rampant lion decoration on the head tube. also, there's a logo by clycart of san marcos, ca on the bottom bracket. which i believe was affiliated with some people from masi, or medici. the bike is a hybrid of italian and japanese parts. the shifters, seat post, brakes, and cranks are all shimano dura-ace. galli headset, ttt stem/bars, and mavic rims. the down tube and seat tube are teardrop shaped, and the brake and shifter cables are all internal. also, interesting is the rear brake which mounts of the frame near the bottom bracket. it has some nice hand lugging on the frame. anyone can help identify anything about the bike? thanks.

https://www.flickr.com/photos/2813541...n/photostream/
https://www.flickr.com/photos/2813541...n/photostream/
https://www.flickr.com/photos/2813541...n/photostream/
https://www.flickr.com/photos/2813541...n/photostream/
https://www.flickr.com/photos/2813541...n/photostream/

What is the serial number?
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Old 12-24-08, 03:13 PM
  #62  
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my 81 gitane aero tt bike



Last edited by lofter; 12-24-08 at 03:17 PM.
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Old 12-24-08, 10:13 PM
  #63  
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Stick a Bernard Hinault Turbo saddle on that Gitane, and it's done.
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Old 12-24-08, 10:58 PM
  #64  
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^^^^what kind of a seatpost is on the Gitane? I have not been able to get a good fit on the Medici, yet, and this looks like the tubing set that I have.
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Old 12-25-08, 01:20 PM
  #65  
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my 1984 fullpro a

[IMG][/IMG]
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Old 12-25-08, 01:52 PM
  #66  
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Yep, these were considered "aero." I believe the thinking was that since they were positioned on top of the downtube, as opposed to on the sides, that they would have less wind resistance. We have them on our '83 Nishiki International.



Originally Posted by Lamplight View Post
Not exactly an aerodynamic bike, but I believe these generic Suntour shifters were spawned from the aero trend:

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Old 12-25-08, 05:09 PM
  #67  
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This is my Kenevans lo-pro. My guess is that it was one of Ken's earlier attempts as the front-end geometry is not sorted out - it only wants to track in a straight line. Still, it is a fun bike to have.

I like the Weinnman Delta brakes.




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Old 12-25-08, 05:20 PM
  #68  
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↑ That looks very... painful. How does it ride?
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Old 12-25-08, 06:05 PM
  #69  
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The position is like riding on the drops - it's quite OK. It's just the front end geometry that isn't quite sorted out.
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Old 11-08-09, 11:40 AM
  #70  
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Time to resurrect this thread

Collected this Koga-Miyata FullPro-S a week ago. It is ueberrare. It is not featured in any catalogue and I also have never encountered a pic or writing on it, not to mention spotting one live. Untill today I only heard a vague rumour about its excistance ...BUT now I got this one myself.

With it's age it is bit outside the scope of this thread (being 81-83), but at the same time it is just its age that makes it interesting. It is from 1977, what can be considered early for an attempt to create a bike with aerodynamic features.

The aerodynamic features: All cables run hidden inside the frame. All cables, so also the shift cables. The rear brake cable exits through a hole in the seatpost. Shifters are located on top the downtube. The seatstays are the fastback type. Brake calliper mounting bolts are of the recessed type, but they do not look like the generic ones you find on every (modernish) bike. They look, like the seatbolt, special milled for this frame. All stainless. The bottom bracket is with its 63mm width very narrow.

The bike came with full 1st gen Dura Ace, but with the aluminum Super Record headset. In an attempt to save weight maybe, as the aluminum Dura Ace EX came available only a couple of years later. 3T cockpit, of which the stem had seen drilling.

Pictures >>>

Close up of shifter unit on top down tube. The shifters are mounted directly to braze on, unlike with later AX style shifters which formed one assembly that you bolted onto the frame.

The shift cables enter downtube through brazed on minitubes...



.., leave seattube for front mech operation..



...and exit chainstay this way >>



Inside the frame the cables run guided (braze ons can be spotted when looking in the BB shell), but its looks like this is only for operation and not for installation. So last thing you want to do is replacing the cables.

With the rear brake cable routing it is more or less the same. Cable enters top tube right after the headlug >>>



...and exits through the seatpost. The procedure is: Set the post at the for you required height, mark where the cable has to leave, take post out and dril hole.

En profil pic of the frame:



The bolt that secures the post threads directly into the left seatstay. That bolt looks, like the recessed brake calliper mounting nuts, specially milled from stainless steel. No pic available yet. That the the bottom bracket shell is 63mm wide is hard to catch in a pic, but you can see a glimpse of the multiple holes drilled in the shell. This is not unique for this frame though. Many more Miyatas had it and all the other 'newer' FullPros I know had 'M' cut outs in the shell.

My knowlegde of Japanese is quite limited. I have absolutely no idea what this sign represents or says >>

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Old 11-08-09, 11:58 AM
  #71  
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Originally Posted by Elev12k View Post

My knowlegde of Japanese is quite limited. I have absolutely no idea what this sign represents or says >>

It is the Pumpkin King

great bike!
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Old 11-08-09, 12:42 PM
  #72  
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Anyone else intrigued by the "4140" sticker? Isn't cro-mo always 4130?
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Old 11-08-09, 12:50 PM
  #73  
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Send T-mar a message about that Koga-Miyata. I'm sure he can help you out
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Old 11-08-09, 12:56 PM
  #74  
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Originally Posted by dannyg1 View Post
Anyone else intrigued by the "4140" sticker? Isn't cro-mo always 4130?
It's 10 more than your average cro-mo! Nice!
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Old 11-08-09, 11:40 PM
  #75  
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Originally Posted by guygadois View Post
I'll throw my newly finished aero style bike in the ring...




Hand drilled hubs to allow aero spokes.
Well, it is official... I have fallen in lust with a bike, and I cannot believe I am about to post that fact.
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