Mismatching Campy 1/8 and DA?
08-17-14, 07:35 PM
#1
Senior Member
Thread Starter
Join Date: Mar 2013
Location: Manhattan, New York
Posts: 215
Bikes: '85 Pinarello track, '74 Peugeot PR-10 L, '73 Motobecane Mirage (RIP 2014), '81 Raleigh Roadster (RIP 2013), '88 Peugeot Santé Fixed (RIP 2014)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Mismatching Campy 1/8 and DA?
Hey all,
I'm thinking about running a 1/8 DA chain wheel (49) and 1/8 Campy rear cog (15) on my bike.
Given the teeth are slightly different (DA has sharper teeth and Campy squarer, I'm wondering if I should have them match Both DA or both Campy.
Any advice?
Ash
I'm thinking about running a 1/8 DA chain wheel (49) and 1/8 Campy rear cog (15) on my bike.
Given the teeth are slightly different (DA has sharper teeth and Campy squarer, I'm wondering if I should have them match Both DA or both Campy.
Any advice?
Ash
08-17-14, 08:27 PM
#2
Senior Member
Join Date: Apr 2012
Location: Minneapolis, MN
Posts: 211
Bikes: 1991 Eddie Merckx Corsa, 1991 Cannondale 3.0 Road Race, 2008 Bianchi Pista
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I wouldn't notice a difference between any of those set-ups. I also wouldn't spend more money to have matching drivetrain parts. YMMV.
08-17-14, 08:50 PM
#3
Senior Member
Join Date: Sep 2006
Location: Gnv, FL
Posts: 1,890
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
What hub are you running? Did Campy make any BSA threaded cogs? Give us some more specifics and don't buy something that potentially doesn't even fit your hub...
08-17-14, 09:41 PM
#4
Veteran Racer
Join Date: Jul 2009
Location: Ciudad de Vacas, Tejas
Posts: 11,757
Bikes: 32 frames + 80 wheels
Mentioned: 26 Post(s)
Tagged: 0 Thread(s)
Quoted: 1331 Post(s)
Liked 764 Times
in
431 Posts
Although English and Italian hub threading is not identical, it is sufficiently close to interchange cogs and freewheels. The pitch is the same (24 TPI) and the difference in diameter is only 0.2mm. A Campy cog will be a slightly loose fit on an English threaded hub.
08-17-14, 09:49 PM
#5
Veteran Racer
Join Date: Jul 2009
Location: Ciudad de Vacas, Tejas
Posts: 11,757
Bikes: 32 frames + 80 wheels
Mentioned: 26 Post(s)
Tagged: 0 Thread(s)
Quoted: 1331 Post(s)
Liked 764 Times
in
431 Posts
This is irrelevent, since the chainring and cog do not mesh directly, and the chain just needs to also be 1/8".
08-17-14, 10:28 PM
#6
Senior Member
Join Date: Sep 2006
Location: Gnv, FL
Posts: 1,890
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Sheldon: "English and Italian are all semi-interchangeable, but you shouldn't go back and forth between different types of freewheels on the same hub repeatedly."
Apparently Surly even issues the same warning: "It is important to not switch back and forth between cogs and/or hubs with different threads." (https://surlybikes.com/uploads/downlo...og_5.16.05.pdf)
I personally would not advocate mixing the two threads, but go ahead if you must.
Apparently Surly even issues the same warning: "It is important to not switch back and forth between cogs and/or hubs with different threads." (https://surlybikes.com/uploads/downlo...og_5.16.05.pdf)
I personally would not advocate mixing the two threads, but go ahead if you must.
08-17-14, 11:19 PM
#7
Veteran Racer
Join Date: Jul 2009
Location: Ciudad de Vacas, Tejas
Posts: 11,757
Bikes: 32 frames + 80 wheels
Mentioned: 26 Post(s)
Tagged: 0 Thread(s)
Quoted: 1331 Post(s)
Liked 764 Times
in
431 Posts
For several decades I raced on the track using Dura Ace and Suntour cogs with English threading on my Campy Italian threaded track hubs w/o any problems. I think the warnings are exagerated.
08-17-14, 11:28 PM
#8
THE STUFFED
Join Date: Oct 2009
Location: San Francisco, CA
Posts: 12,671
Bikes: R. Sachs Road; EAI Bareknuckle; S-Works Enduro
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 361 Post(s)
Likes: 0
Liked 20 Times
in
17 Posts
As far as track components go, the only thing that you shouldn't mismatch between those two brands are the lockrings because they have different threading.
08-18-14, 05:56 PM
#9
Old fart
Join Date: Nov 2004
Location: Appleton WI
Posts: 24,784
Bikes: Several, mostly not name brands.
Mentioned: 153 Post(s)
Tagged: 0 Thread(s)
Quoted: 3587 Post(s)
Liked 3,400 Times
in
1,934 Posts
08-18-14, 09:25 PM
#10
Senior Member
Thread Starter
Join Date: Mar 2013
Location: Manhattan, New York
Posts: 215
Bikes: '85 Pinarello track, '74 Peugeot PR-10 L, '73 Motobecane Mirage (RIP 2014), '81 Raleigh Roadster (RIP 2013), '88 Peugeot Santé Fixed (RIP 2014)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I have a surly cog on my italian threaded campy pista hub now, and want to change it to a DA, I think. Was thinking of changing front chain ring to DA to match (the chain ring is currently a 48t campy, but 3/32). Im
Tired of maintenance and noise from the chain, which is now a new izumi mod V. Chain line is straight, btw.
Tired of maintenance and noise from the chain, which is now a new izumi mod V. Chain line is straight, btw.
08-19-14, 06:23 AM
#11
Senior Member
Join Date: Jan 2012
Location: Ithaca, NY
Posts: 4,852
Bikes: Click on the #YOLO
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Likes: 0
Liked 12 Times
in
12 Posts
This is a rainy November day question.
__________________
Shimano : Click :: Campy : Snap :: SRAM : Bang
Shimano : Click :: Campy : Snap :: SRAM : Bang
08-20-14, 06:00 AM
#12
Senior Member
Join Date: Oct 2012
Posts: 1,610
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 399 Post(s)
Liked 274 Times
in
136 Posts
I can state from owning a set that Campy did, at least at some time in the past, offer rear track hubs & cogs with English threading:
08-20-14, 06:53 AM
#13
Old fart
Join Date: Nov 2004
Location: Appleton WI
Posts: 24,784
Bikes: Several, mostly not name brands.
Mentioned: 153 Post(s)
Tagged: 0 Thread(s)
Quoted: 3587 Post(s)
Liked 3,400 Times
in
1,934 Posts
08-20-14, 07:12 AM
#14
Veteran Racer
Join Date: Jul 2009
Location: Ciudad de Vacas, Tejas
Posts: 11,757
Bikes: 32 frames + 80 wheels
Mentioned: 26 Post(s)
Tagged: 0 Thread(s)
Quoted: 1331 Post(s)
Liked 764 Times
in
431 Posts
Actually, ISO and English are not exactly the same. English, also called British, is 1.370" diameter threading, whereas ISO is 1.375". Italian is 1.378", which is much closer to ISO than English/British.
08-20-14, 03:23 PM
#15
Old fart
Join Date: Nov 2004
Location: Appleton WI
Posts: 24,784
Bikes: Several, mostly not name brands.
Mentioned: 153 Post(s)
Tagged: 0 Thread(s)
Quoted: 3587 Post(s)
Liked 3,400 Times
in
1,934 Posts
Source: Sutherland's 4th Edition
But we're really picking nits here, aren't we?
08-20-14, 03:37 PM
#16
Veteran Racer
Join Date: Jul 2009
Location: Ciudad de Vacas, Tejas
Posts: 11,757
Bikes: 32 frames + 80 wheels
Mentioned: 26 Post(s)
Tagged: 0 Thread(s)
Quoted: 1331 Post(s)
Liked 764 Times
in
431 Posts
Actually, the term "pitch" refers to the distance between threads, which is 24TPI in all three cases. Thread angle is not the same thing as thread pitch.
08-21-14, 02:24 AM
#17
Grumpy Old Bugga
Join Date: Oct 2006
Location: Adelaide, AUSTRALIA
Posts: 4,229
Bikes: Hillbrick, Malvern Star Oppy S2, Europa (R.I.P.)
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 370 Post(s)
Likes: 0
Liked 8 Times
in
6 Posts
Everyone should down a bottle of rum before reading this thread 
08-21-14, 06:28 AM
#18
Senior Member
Join Date: Oct 2012
Posts: 1,610
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 399 Post(s)
Liked 274 Times
in
136 Posts
Even though its morning, soon as I finish post this I may very well go hit the bottle of rum sitting in the back of my liquor cabinet. Surely this thread has taken a direction the OP never intended but discussions involving Campag bits always get...interesting?
The reason I ended up with those BSA parts I pictured yesterday is that in the throes of wanting to make my bike a full-blooded Italian build, I originally bought a Campy pista hub that the seller stated took Italian threaded cogs. I have quite a few English thread cogs laying around so for curiosity sake tried a couple on it. They did not really want to go on and I was not going to chance ruining the thing so did not force anything. I consider myself lucky to have found someone willing to trade the hub I've got now for it.
As part of researching further, I ran across some old Campagnolo catalogs online and found that Super Record Pista hubs were made in 3 threadings: 35x24F, 34.7x1M and 1.37x24F. I also found several different thread patterns for available lockrings. Campagnolo's new lockrings are 1.32x24F, which I could not determine for sure if it fits on old SR Pista hubs.
The seeming multitude of thread varieties I found for Campy pista hubs, cogs, and lockrings finally got to be too much for me so I ended up just sticking with my Jap wheels. Threads like this reinforce my decision.
Now to find that Rum...or maybe I should have some Bourbon instead?
The reason I ended up with those BSA parts I pictured yesterday is that in the throes of wanting to make my bike a full-blooded Italian build, I originally bought a Campy pista hub that the seller stated took Italian threaded cogs. I have quite a few English thread cogs laying around so for curiosity sake tried a couple on it. They did not really want to go on and I was not going to chance ruining the thing so did not force anything. I consider myself lucky to have found someone willing to trade the hub I've got now for it.
As part of researching further, I ran across some old Campagnolo catalogs online and found that Super Record Pista hubs were made in 3 threadings: 35x24F, 34.7x1M and 1.37x24F. I also found several different thread patterns for available lockrings. Campagnolo's new lockrings are 1.32x24F, which I could not determine for sure if it fits on old SR Pista hubs.
The seeming multitude of thread varieties I found for Campy pista hubs, cogs, and lockrings finally got to be too much for me so I ended up just sticking with my Jap wheels. Threads like this reinforce my decision.
Now to find that Rum...or maybe I should have some Bourbon instead?
