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Name that vintage crankset game...
Yeah, I don't know the answers except for one...with a slight clue about a second...
https://cimg8.ibsrv.net/gimg/bikefor...1bf20e3be4.jpg https://cimg9.ibsrv.net/gimg/bikefor...aedd989d5e.jpg https://cimg2.ibsrv.net/gimg/bikefor...d561a408af.jpg https://cimg3.ibsrv.net/gimg/bikefor...7097507d28.jpg https://cimg6.ibsrv.net/gimg/bikefor...3d8435ea52.jpg Obviously know this one... |
Won't be selling them since one will be on the Bottechia deLuxe wall art bike and the other three decorations (until I can find a use for the 4th)
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I believe the CampI one is early Gran Sport
Isn't a double headed eagle crest a Polish thing? |
No that one is a variation of the "Maxy" or "Maxi". Most common is the one made by Sugino but that one is (I believe) by Sakae Ringyo
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Originally Posted by unworthy1
(Post 21387956)
No that one is a variation of the "Maxy" or "Maxi". Most common is the one made by Sugino but that one is (I believe) by Sakae Ringyo
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Originally Posted by Bianchigirll
(Post 21387942)
I believe the CampI one is early Gran Sport
Isn't a double headed eagle crest a Polish thing? The eagle guy is made in Japan and my suspicion is early SR...it's on odd little guy. |
The one at nine o'clock is the one that several folks thought might be a Williams, but could never confirm.
The one at six o'clock came from Poland, but was on a Bottecchia so I suspect it might be one of the Italian makes? Went through every velobase crank and saw nothing on the SR and Bottecchia one. |
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This particular eagle crest on the crank arm indicates a set which is part of the Sakae Ringyo Custom 3 series. There are other models of the Custom 3 with a forged 3-arm spider where the outer chanwheel is removable. Three-arm SR sets had been discontinued by the late 1970's. --- The cottered steel set with the lacy single chainwheel is Italian and was employed on the Bianchi planetary three-speeds of the late 1950's and early 1960's - typically marked "Bianchi." Do not know the maker. Usual suspects are Way-Assauto, Magistroni (Giostra). Gnutti and Agrati. ----- |
The cottered one seems to be similar to the crankset that‘s installed on my Chiorda. Unfortunately there‘s no designation on it.
https://cimg4.ibsrv.net/gimg/bikefor...f3ea532ec.jpeg |
Originally Posted by juvela
(Post 21388113)
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This particular eagle crest on the crank arm indicates a set which is part of the Sakae Ringyo Custom 3 series. There are other models of the Custom 3 with a forged 3-arm spider where the outer chanwheel is removable. Three-arm SR sets had been discontinued by the late 1970's. --- The cottered steel set with the lacy single chainwheel is Italian and was employed on the Bianchi planetary three-speeds of the late 1950's and early 1960's - typically marked "Bianchi." Do not know the maker. Usual suspects are Way-Assauto, Magistroni (Giostra). Gnutti and Agrati. ----- 1. The SR custom was the route I looked for, but I could not find anything with double fluting, nor the "BS" in the engraving. I found plenty of similar single flute, SR engraved cranks. Also the chainrings are oddities. 2. Good call with Way Assauto; I limited myself to Magistroni and Gnutti. |
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The BS marking on the eagle crest crank arm is an indication that it was produced for Bridgestone. Bridgestone had quite an assortment of logos/crests which were employed through time. I always recall their keystone one; think "HEINZ 57" ;) --- One minor check you can make on the Italian arm is to see if its dentition is intended for 1/8" or for 3/32" chain. The arm was employed on both planetary and derailleur geared drive trains. There are Italian single plateau derailleur drive trains where 1/8" chain, chainwheel and gear block were employed. Have in my workshop a 1972 Chiorda built derailleur five-speed berceau machine done for Kmart (AllPro brand) with this arrangement. Regina made multi-cog gear blocks for 1/8" chain. ----- |
The Campagnolo Gran Sport crankset is from around 1982.
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Originally Posted by Kovkov
(Post 21388143)
The cottered one seems to be similar to the crankset that‘s installed on my Chiorda. Unfortunately there‘s no designation on it.
https://cimg4.ibsrv.net/gimg/bikefor...f3ea532ec.jpeg |
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addendum on the set with the eagle crest - [often remind meslef of Lieutenant Columbo in that I think of "just one more thing" on the way out the door] it bears a striking resemblance to the earliest Silstar sets. one thing unique regarding these is their use of the odd three degree taper. AFAIK there is no other manufacturer who has employed this taper. you can check your example there to see if it is two degree or three degree. if it is three degree it is definitely "a duck." one other odd thing about early Silstar series sets is their use of an unusually thick chainwheel spacer. evidently, the manufacturer wished riders to be able to run the small - small gear combination without the chain rubbing on the inner face of the outer chainwheel. this design unfortunately brings up the possibility of derailments where the chain wedges between the chainwheels. --- Chiorda note - this manufacturer had a many decades long close association with Agrati. their frames not only employed Agrati lugs, crown and shells. but also Agrati ends, bridges, headsets, bottom brackets & sometimes cranksets. so it is possible our mystery Italian chainset was indeed made by the firm. have an Agrati catalogue which illustrates five or six patterns of a single chainwheel swaged to a crankarm but does not show our subject pattern. only some Agrati products are marked with the name, most are not. --- Way-Assauto note - this maker ceased the manufacture of cycling fittings about 1972. they are still a going concern today but have not produced any cycle fittings in nearly fifty years. ----- |
Takagi Not SR Crank
jdawginsc Good guess on the Japanese cotterless crank but it's a very early Takagi brand not a SR Sakae Ringyo.
Here's the tell: Your crank has a double headed eagle and 2 flutes in the arm. The "BS" caught my eye too and can either stand for Bull S**t or Bridgestone??? :lol: https://cimg9.ibsrv.net/gimg/bikefor...205025100a.jpg SR (Sakae Ringyo) cranks from that era had a single headed eagle and single flute. https://cimg0.ibsrv.net/gimg/bikefor...3e47ab6230.jpg Takagi (3 Arrows) was a Japanese crank manufacturer that made steel cottered cranks and single piece Astabula style cranks. In the early 70's they were part of the JBM Marketing Group and were later swallowed up by Shimano. They continued to market 2nd tier cranks under the Takagi brand and catered to the BMX and MTB market up into the late 1980's. From the 1974 JBM Group Catalog. https://cimg0.ibsrv.net/gimg/bikefor...de466cc0d7.jpg Your cranks were some of the first Japanese made aluminum cotterless cranks from around 1972-73. The Japanese euphemistically called the process "Melt Forged" as cast into the SR crank arm... They were injection molded/pressure cast parts with no where near the strength of a forging. The steel chainrings were swagged onto the cast aluminum crank arm. The reason why I mention this is that these early cranks from Takagi, SR Sakae Ringyo, Sugino and Shimano all had a tendency to fail at the swagged attachment. These cranks were made for the export market and used the same size swage as steel cottered cranks. Western riders were 25 to 50+% heavier than the average Japanese person and easily exceeded the strength of the swage which caused the rings to spin on the crank arm. https://cimg3.ibsrv.net/gimg/bikefor...435ed12822.jpg First generation Sugino Maxi crank with the small swagged area. In 1973 Gitane started using these cranks on their Interclub entry level racing model. Over half of those cranks failed and we had to pull cranks off of new bikes to use as replacements. It took Gitane over 6 months to get us updated replacement cranks! https://cimg4.ibsrv.net/gimg/bikefor...893b45ab3d.jpg By 1974-75 the Japanese manufacturers started using larger swage cross sections which mostly cured the problem. https://cimg7.ibsrv.net/gimg/bikefor...0570612713.jpg noglider the Campy crank is the the 3320/A Sport model which was part of the Gran Sport gruppo. They first appeared in the 1974 Campy catalog and were replaced by the 5 arm Grand Sport cranks with 144mm BCD rings in 1977. I have a set of Sport alloy cranks on my 1973 Holdsworth Competetizone. The 116mm BCD chain rings came as either a riveted together set or bolted together like the OP's. They were listed as available in 49/42, 50/42, 51/42, 52/42 and 53/42 teeth but most were 52-42T https://cimg4.ibsrv.net/gimg/bikefor...a871ed463c.jpg jdawginsc The chain rings on your cranks are mounted wrong. They're on the back side of the spider. Before the alloy Sport cranks came out in 1974 Campy made an elegant steel cotterless model, the 3320 Sport introduced in 1971. They used the same 116mm BCD chainrings. https://cimg9.ibsrv.net/gimg/bikefor...5d90aad9c9.jpg Good luck on your project... BTW, the Polish Coat of Arms has a single headed eagle so there is no connection to Poland... verktyg :50: |
You guys amaze me with your knowledge.
Verktyg Gransport definitely came mounted wrong. Haven't gotten a chance to break down and clean yet. I love it, though. Will be sure I do NOT repeat the seller's mistake...Maybe they were messing with the chainline. I love my BS crank. It's so quirky and mismatched Juvela I am finding unbranded Italian vintage cranksets to be a crapshoot in searching. SOOOOOoooo many styles. |
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