Marathon "oversized" crank information please

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DJF

Finally riding a big boys bike
Oct 21, 2017
150
85
48
Erie, KS, United States
#1
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
 
Last edited:
Likes: hoofhearted

hoofhearted

Saint Lactose The Tolerant
Jan 20, 2010
3,690
4,975
Fairborn, Ohio
#5
Had @dave the wave never sent me that info ...
we might all be lacking in knowledge on this machine.

Many thanks to Dave @dave the wave .

..... patric


In addition ... the Marathon drive chainring sports 80 teeth.
The rear cog has 30.
 
Likes: dnc1

shoe3

I live for the CABE
In Memoriam
Feb 2, 2011
1,098
892
Springfield, United States
#6
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

I live for the CABE
Apr 1, 2016
1,619
3,984
52
Wallingford, Oxfordshire, UK
#7
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!
 
Likes: hoofhearted

hoofhearted

Saint Lactose The Tolerant
Jan 20, 2010
3,690
4,975
Fairborn, Ohio
#8
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
 
Likes: dnc1

dnc1

I live for the CABE
Apr 1, 2016
1,619
3,984
52
Wallingford, Oxfordshire, UK
#10
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.
 
Likes: hoofhearted

Archie Sturmer

Finally riding a big boys bike
Jun 13, 2018
284
209
Los Angeles, CA, USA
#11
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
3,690
4,975
Fairborn, Ohio
#12
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
 
Last edited:
Likes: dnc1

DJF

Finally riding a big boys bike
Oct 21, 2017
150
85
48
Erie, KS, United States
#14
What is the comparison in size between the marathon and the racycle's largest crank/ring?
 

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