racycle pacemaker chainwheels

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bud poe

I live for the CABE
Aug 18, 2009
1,050
23
Portland, Or.
#1
Wondering what other racycle pacemaker chainwheels out there have these little holes drilled in the outer rim. Look closely they are very imperfect in their placement on this one (borrowed from a local chum).

These look like a diy mod to me but what do you guys think? I feel like I've seen other PM chainwheels with these little holes, did any come from the factory like this? Any ads show this?

Also anyone know how they were manufactured? These look cast to me...
IMG_2724.JPG
IMG_2726.JPG
IMG_2725.JPG
 
Likes: hoofhearted

corbettclassics

I live for the CABE
Feb 11, 2012
1,286
2,166
Burbank, United States
#3
I was told by a Racycle expert that the little holes drilled on the outer ring part was a one yr thing. But he did say it could have been 2 yrs but he always felt it was a one yr deal. I just can’t remember what year he said though. I guess I could always send him an email.
 

bud poe

I live for the CABE
Aug 18, 2009
1,050
23
Portland, Or.
#10
Thanks @filmonger for the info and links/pics, yes this is @thehugheseum piece just borrowing it. Neat to see the mfg, I see they were gang cutting the teeth. Do you think they were cast blanks?

Funny to see a pile of chainwheels just laying on the factory floor. Those shaft/belt driven factories were insanely dangerous too.
 
Likes: hoofhearted

filmonger

Riding a '38 Autocycle Deluxe
Dec 25, 2010
4,868
5,504
Dublin, Ireland
#11
Not sure about the blanks...... but pictures are worth a thousand words. Yea, I thought the same thing when I saw them on the floor. Still cool to see part of the process.
 
Likes: hoofhearted

corbettclassics

I live for the CABE
Feb 11, 2012
1,286
2,166
Burbank, United States
#12
I found this chainring over 10 yrs ago for $75 ( also drilled out ) and put it on my Pacing bike for the look. These Racycle chain rings are definitely the cool factor..!! It was the only chain ring I could find to replicate the original Brennabor rings.

The photo below is Thaddaus Robl of Germany - Pacing champion on his Brennabor ( 1902 - '04 )

L1120788.JPG


4cbaddbdbc049a8a79bb027dc2642bae4.jpg


$_57 2.JPG
 

anders1

I live for the CABE
Jun 18, 2018
1,031
1,135
44
Southern California, USA
#13
The chain wheels are very large and heavy, but were made for racing. So maybe the holes were drilled to take weight off. Old gasser drag cars use to drill out the post and frame the same way. Enjoy the ride fellas...
 

anders1

I live for the CABE
Jun 18, 2018
1,031
1,135
44
Southern California, USA
#14
The chain wheels are very large and heavy, but were made for racing. So maybe the holes were drilled to take weight off. Old gasser drag cars use to drill out the post and frame the same way. Enjoy the ride fellas...
 

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