vintagerando

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?

P!N20

Look like it: VeloBase.com - Component: Sugino Mighty Tour (triple)

HTupolev

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.

non-fixie 

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.

vintagerando

What does "swaged" refer to?

non-fixie 

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:

bikemig 

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.

Moe Zhoost

Yes.

T-Mar

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.

Hudson308 

Here's what a swaged crank looks like from the front. Note the arm/spider interface.

vintagerando

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.

vintagerando

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.

wrk101

Missing the chain guard. Thats the reason for the odd holes on the outer ring. Sugino had a unique chain guard.

rando_couche

But the one in the OP's photo is definitely a Mighty Tour. (One of the coolest cranksets EVER, imho)

vintagerando

Thats it.....no more whining about the driving distance. I'm setting a plan to get this.

stardognine

Yeah, right behind the Aero Tour triple, lol. 😁😉 Both Sugino, both cool. 👍

noglider 

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.