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1980 Semi-sloping Fork Crowns

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1980 Semi-sloping Fork Crowns

Old 04-29-19, 06:25 PM
  #1  
avhed
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1980 Semi-sloping Fork Crowns

I am sticking to semi- sloping full crowns because open crowns, flat and full sloping ones have no appeal to me.

Ishiwata 555-Oval 28/20

There is also a 565 with a straighter line from fork blade to crown. Looks like a Cinelli MC.
Ishiwata Catalog pdf on the bottom of this post.



The Bocamas: VeloBase.com - View Single Frame Part the upper has 27.5/20mm sizes for forklegs and the lower has old 28.5/16.5mm sizes.



Cinelli MCA



Cinelli MR:145 grs 28.5/16.5

Cinelli MC:153grs 27/20

Everest


This is the Haden Europa I have on a custom build from 1980: 27/20 27.5/20 29/16


Zeus:the middle is 29/16 145 gr., on the right is 27.5/ 20 140 gr.




The 2 on the right are Davis

Columbus
Attached Files
File Type: pdf
Ishiwata Catalog 2 opt 18.pdf (367.4 KB, 3 views)

Last edited by avhed; 03-27-21 at 03:09 PM.
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Old 04-29-19, 06:35 PM
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Davis
Zeus
Bocama
Ishiwata
Columbus
Tange
3Rensho

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Old 04-30-19, 01:52 PM
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-----

Milremo (at least four patterns)

Takahashi

Agrati (at least six patterns)

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Old 05-15-19, 09:26 PM
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Agrati


Roto on the top right

The following 4 pics are for bike brands:

Vitus Continental Crown on the left middle.

Trek

Benotto

Before 1972, these Colnago Crowns have a C around the leaf, 1972 and after, no C.

Last edited by avhed; 03-27-21 at 03:43 PM.
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Old 05-16-19, 06:20 AM
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Fork Crowns - Odds and Ends - Not All Semi-Sloping

@juvela and @jvhed

Milremo was a brand name for primarily private labeled bike components and accessories. The brand was shared by Cycles Andre Bertin in the French market and Ron Kitching in the UK.

They shared a lot of the private labeled items like pedals, hubs, rims, bars, stems and so on in both countries but had specialty products that were sold only in their respective markets.

Milremo made nothing. The name came from the Milan-San Remo early season Italian classic.

The fork crowns pictured above were made by several different manufacturers. The full sloping crown was probably made by Davis but several other manufactures in the UK made that style too. The crown in the upper right corner is probably an Ekla?

The Milremo dropouts were made by Mavic or at least made for them.

Ekla crowns and lugs were popular in the UK during the 40's and 50's. They appear to still have been available in the late 60's or early 70's.


Ekla 23 Bottom view - no idea what the top looks like.



Wagner crowns were available in a wide variety of styles and were popular in many European markets plus with US builders up into the early 1980's. The better quality crowns were made of forged steel. The cheap ones were stamped steel.


The ubiquitous DP+ chevron top model used on 1,000s of mid range Motobecanes and many others during the 70's.




Lest no forget Nervex crowns. They also made a variety of styles. The two most common ones in the 60's and 70's were the Professional and the Dubois models.



Nervex Profession crown.



Two versions of the Nervex Dubois crown. The chevron top was used on PX-10s for years.



Cinelli Twin Plate Crown. Masi used these on some frames in the early 70's.


This is a fake twin plate crown on a Masi.



Twin plate crowns were elegant but a lot of work to braze and finish.

Maxed out at 10 pictures. See my next post below for more fork crowns.

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Last edited by verktyg; 05-16-19 at 07:21 AM.
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Old 05-16-19, 07:05 AM
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Attached Images
File Type: jpg
zeus-crowns.jpg (91.3 KB, 56 views)
File Type: jpg
crowns.jpg (45.0 KB, 56 views)

Last edited by JohnDThompson; 03-27-21 at 06:44 PM. Reason: Lost pics
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Old 05-16-19, 07:08 AM
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More Crowns

Swiss made George Fischer crowns were used on top end Italian bikes like Masi, De Rosa and others.



From this crude casting came this sleek beauty. A lot of filing and sanding.



As mentioned above, Davis cast crowns were used on a lot of British bikes. There were several other small British companies that made cast or forged crowns that looked similar. Before picture.



Raleigh Pro with a Davis crown.



I spent a number of hours grinding, filing and sanding this Davis crown on the off road trekking frame that I built back in 1992.



Bocama (BCM) investment cast crowns.



French made aero design Arcor Microfusion investment cast crown. These were used on a lot of the top quality French bikes in the mid to late 80's.



Selection of cast crowns from various manufacturers sold by a frame building supplier in the US.


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Old 05-16-19, 07:18 AM
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In addition to Ishiwata and Tange, Japan had several fork and frame fitting manufacturers including Eisho, Kobayashi, Miwa, Nikko. Otsuya, Sanya and Yamazaki. I imagine that most of them had a semi-sloping crown but the establishment of Ishiwata's and Tange's pre-built fork programs seem to have eliminated them or at least pushed them into obscurity by the 1980s.
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Old 05-17-19, 07:54 PM
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Who made this one (on a late '80s CIOCC and Cromor fork blades says the decals). Somebody thought "Cinelli" but I don't recall seeing a pic of it in any catalog nor on Velobase...seen it on other Italian marques, however.
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Old 05-17-19, 09:12 PM
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A really outstanding thread. Thank You Everyone!!!

: Mike
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Old 05-18-19, 01:34 AM
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Agreed, great thread, thank you all!
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Old 05-18-19, 08:06 AM
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A couple crowns for you conversant kings of classic:

Bocama?


From my Bianchi-built Puch
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Old 09-08-19, 01:37 PM
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Agrati crown nr. 000.8048, part of Agrati lug ensemble "AM" nr. 000.8040/U.



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Last edited by juvela; 09-08-19 at 01:44 PM. Reason: punctuation
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Old 03-27-21, 02:35 PM
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I have added a bit to my post #1 & #4
This post is for a couple of current ones:

Allotec 28/19 oval fork blades. 152gr
201124-2240 NOVA SEMI SLOPED ROAD CROWN FOR OVAL BLADES for 28.6 steerer

Last edited by avhed; 03-27-21 at 03:10 PM.
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