Marathon "oversized" crank information please

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DJF

Finally riding a big boys bike
Oct 21, 2017
190
50
Erie, KS, United States
Could anyone out there that has information on the oversized Marathon crank please post it?
Year first produced?
Types?
What frames it was able to mount in?
Pictures, ads or any documentation?
Examples?

Thank you
 
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shoe3

I live for the CABE
In Memoriam
Feb 2, 2011
1,094
Springfield, United States
Would love to tour the neighborhood with that bit..in big ring under me What a ride to behold! Just cruise it
Friends and Romans!
 

dnc1

Cruisin' on my Bluebird
Apr 1, 2016
2,168
53
Wallingford, Oxfordshire, UK
A friend of mine is looking for a similarly sized Chater Lea equivalent! He fancies cruising about on a '20s English machine with such gearing.
What a sight to behold indeed @shoe3!
 
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hoofhearted

Saint Lactose The Tolerant
Jan 20, 2010
4,321
Fairborn, Ohio
Many of us believe the Big Ring supplies nothing more
than shock value to the eye.


But there is more. The use of oversize rings and matching
cogs actually will incur LESS wear and tear on the teeth ..
than will a smaller ring and cog set-up of the same ratio.


Marathon ring and cog tooth count 80 and 30.

Other ring and cog tooth counts ... 40 and 15 (maybe 14 or 16).

Let's reduce again ..... 20 and 7 or 8.

Could be I am wrong.

..... patric
 

dnc1

Cruisin' on my Bluebird
Apr 1, 2016
2,168
53
Wallingford, Oxfordshire, UK
Another friend describes his walking speed as 53/14. He's a former track champion.
 
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dnc1

Cruisin' on my Bluebird
Apr 1, 2016
2,168
53
Wallingford, Oxfordshire, UK
Many of us believe the Big Ring supplies nothing more
than shock value to the eye.


But there is more. The use of oversize rings and matching
cogs actually will incur LESS wear and tear on the teeth ..
than will a smaller ring and cog set-up of the same ratio.


Marathon ring and cog tooth count 80 and 30.

Other ring and cog tooth counts ... 40 and 15 (maybe 14 or 16).

Let's reduce again ..... 20 and 7 or 8.

Could be I am wrong.

..... patric
My friends reasoning exactly for his Chater Lea quest, less wear and tear, and therefore, in his opinion, greater efficiency.
 
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Archie Sturmer

I live for the CABE
Jun 13, 2018
1,319
Los Angeles, CA, USA
Less wear: the design trade-off, (besides the sprockets), may be a longer chain (more piece-parts).

The title refers to oversize cranks and it looks like the Marathon chain rings may interface with fairly common cranks, or were the cranks oversize too (?).
We are familiar with long cranks (e.g., 180mm and 7"), but I have also seen old cranks with oversize threads, (requiring cones, nuts, washers, with oversize threads).
 

hoofhearted

Saint Lactose The Tolerant
Jan 20, 2010
4,321
Fairborn, Ohio
Less wear: the design trade-off, (besides the sprockets), may be a longer chain (more piece-parts).

The title refers to oversize cranks and it looks like the Marathon chain rings may interface with fairly common cranks, or were the cranks oversize too (?).
We are familiar with long cranks (e.g., 180mm and 7"), but I have also seen old cranks with oversize threads, (requiring cones, nuts, washers, with oversize threads).

The correct 80-T Marathon ring that I own is holed for
the Westfield Double-D. Takes standard Westfield ..
double-d .. bayonet style .. non dog-leg .. adult-male
crank, and hardware.


It has a light coating of toasty rust ... is slightly out of
alignment ... is not egg-shape out of alignment ... the
teeth are sharp by design .. they are not worn.


Half-Inch Pitch.

Had it for years ... now I have other big rings that really
dial my peepers in to tractor-beam. No longer have an
interest in this relic.



..... patric
 
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DJF

Finally riding a big boys bike
Oct 21, 2017
190
50
Erie, KS, United States
What other large cranks/rings are like this?
 

DJF

Finally riding a big boys bike
Oct 21, 2017
190
50
Erie, KS, United States
What is the comparison in size between the marathon and the racycle's largest crank/ring?
 

DJF

Finally riding a big boys bike
Oct 21, 2017
190
50
Erie, KS, United States
I am wanting to buy a Marathon crank and parts, will take information as well to bikes used on.
 

DJF

Finally riding a big boys bike
Oct 21, 2017
190
50
Erie, KS, United States
I am looking for information as well as parts, I need to have years, models, and types of crank/bottom ends available to help us.
 
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