ID Sugino Triple cranks?
#1
Senior Member
Thread Starter
ID Sugino Triple cranks?
I am planning on driving a solid distance to try to acquire these from a CL seller. Any Sugino experts out there?
Are these indeed "Mighty Tour" 110bcd cranks? The seller has little knowledge or desire to take additional pics or give more info. (He doesn't speak bike).
So, I would be rolling the dice with only this grainy, cropped photo to go on.
What do you think?
Are these indeed "Mighty Tour" 110bcd cranks? The seller has little knowledge or desire to take additional pics or give more info. (He doesn't speak bike).
So, I would be rolling the dice with only this grainy, cropped photo to go on.
What do you think?
#2
Senior Member
Join Date: Aug 2010
Location: Wurundjeri Country
Posts: 2,469
Mentioned: 32 Post(s)
Tagged: 0 Thread(s)
Quoted: 1079 Post(s)
Liked 1,899 Times
in
931 Posts
Look like it: VeloBase.com - Component: Sugino Mighty Tour (triple)
#3
Senior Member
It definitely looks like it. Here's the one on my 1979 Fuji America:
These photos are from 2016, when I had it set up with its original polished chainrings.
These photos are from 2016, when I had it set up with its original polished chainrings.
#4
Shifting is fun!
Join Date: Aug 2009
Location: South Holland, NL
Posts: 11,006
Bikes: Yes, please.
Mentioned: 280 Post(s)
Tagged: 0 Thread(s)
Quoted: 2198 Post(s)
Liked 4,601 Times
in
1,764 Posts
Be aware that there is also a swaged version; called Super Maxy. Works probably just as well, but is worth a bit less to most people.
#5
Senior Member
Thread Starter
#6
Shifting is fun!
Join Date: Aug 2009
Location: South Holland, NL
Posts: 11,006
Bikes: Yes, please.
Mentioned: 280 Post(s)
Tagged: 0 Thread(s)
Quoted: 2198 Post(s)
Liked 4,601 Times
in
1,764 Posts
It's a word I picked up on this forum, I think, and means the crank and spider are not made from a single piece of metal, but separate pieces "crimped" together. Like so:
#7
Senior Member
Join Date: Apr 2012
Location: Middle Earth (aka IA)
Posts: 20,435
Bikes: A bunch of old bikes and a few new ones
Mentioned: 178 Post(s)
Tagged: 0 Thread(s)
Quoted: 5888 Post(s)
Liked 3,471 Times
in
2,079 Posts
This crank is forged not swaged. I believe it is a might tour. It's a nice crank and can be run as a double or a triple but the lowest gear you can run is 34 teeth. I have one that I plan to run on a 1973 Fuji Finest I'm rebuilding.
#9
Senior Member
Join Date: Nov 2004
Posts: 23,223
Mentioned: 654 Post(s)
Tagged: 1 Thread(s)
Quoted: 4722 Post(s)
Likes: 0
Liked 3,036 Times
in
1,874 Posts
Swaging is joining method in which the drive side crankarm and spider (or chainring) are two separate pieces that are mechanically fastened together. A boss on the back of the crankarm protrudes through the spider (or chainring) and is peened/swaged, forming a mushroom head lip similar to a rivet, to hold the spider in place. If you want, you can think of it as a mega-sized riveting process. Often, there is a notch or similar device to help resist torque and prevent the spider (or chainring) from spinning.
Swaged construction eliminates a second mold or die for the drive side crankarm with an integral spider. The left and right crankarms can both be produced using the a single mold or die. A simple insert in the boss cavity, converts it from right to left crankarms. The spider can be then be manufactured by much more efficient stamping of sheet or plate metal. Basically, it's a much more efficient and less costly method to manufacture cranksets. The drawback is the crankarm-spider inteface is not as rigid, though this is not an issue for most cyclists. In rare cases, the swage does fail.
Swaged aluminum crankset such as the Sugino Maxy and SR Silver were instrumental in trickling cotterless, square taper, crankset technology downs to the upper entry level price range during the early 1970s bicycle boom, though in their cases the outer chainring was swaged to the crankarm, making it non-replaceable.
Swaged construction eliminates a second mold or die for the drive side crankarm with an integral spider. The left and right crankarms can both be produced using the a single mold or die. A simple insert in the boss cavity, converts it from right to left crankarms. The spider can be then be manufactured by much more efficient stamping of sheet or plate metal. Basically, it's a much more efficient and less costly method to manufacture cranksets. The drawback is the crankarm-spider inteface is not as rigid, though this is not an issue for most cyclists. In rare cases, the swage does fail.
Swaged aluminum crankset such as the Sugino Maxy and SR Silver were instrumental in trickling cotterless, square taper, crankset technology downs to the upper entry level price range during the early 1970s bicycle boom, though in their cases the outer chainring was swaged to the crankarm, making it non-replaceable.
Last edited by T-Mar; 06-07-19 at 06:32 AM. Reason: typos & syntax
#10
Mr. Anachronism
Join Date: Jan 2013
Location: Somewhere west of Tobie's
Posts: 2,087
Bikes: fillet-brazed Chicago Schwinns, and some other stuff
Mentioned: 29 Post(s)
Tagged: 0 Thread(s)
Quoted: 526 Post(s)
Liked 256 Times
in
165 Posts
Here's what a swaged crank looks like from the front. Note the arm/spider interface.
__________________
"My only true wisdom is in knowing I have none" -Socrates
"My only true wisdom is in knowing I have none" -Socrates
#11
Senior Member
Thread Starter
Ok thanks. Man, I learn a lot from this forum. thanks for info, I wasn't familar with swaged cranks. I zoomed in on the photo as much as possible, it looks like the one I am looking at on CL is forged.
#12
Senior Member
Thread Starter
Yeah, I think I am going to make the drive to purchse this. The frame is gas-pipe and spray painted; but there are some other good parts on the bike though. And, the price is right.
#13
Thrifty Bill
Join Date: Jan 2008
Location: Mountains of Western NC
Posts: 23,525
Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more
Mentioned: 96 Post(s)
Tagged: 0 Thread(s)
Quoted: 1236 Post(s)
Liked 964 Times
in
628 Posts
Missing the chain guard. Thats the reason for the odd holes on the outer ring. Sugino had a unique chain guard.
#14
Senior Member
#15
Senior Member
Thread Starter
#17
aka Tom Reingold
Join Date: Jan 2009
Location: New York, NY, and High Falls, NY, USA
Posts: 40,503
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
Mentioned: 511 Post(s)
Tagged: 0 Thread(s)
Quoted: 7348 Post(s)
Liked 2,470 Times
in
1,435 Posts
Swaged is analogous to riveting, or maybe it's a synonym. I've only seen the rivet come undone once, and a mechanic just hammered it back together. In theory, it's much worse.
__________________
Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.