Track Cog Thread Pitch

[12XU]

I've already done a search on BF and in Google with varying results, but I just want a crystal clear answer. Could I get a listing of the groups of cogs that will work with what hubs? I have some C-Record hubs, but I'm not sure which cogs will work in addition to the Campy one I already have. I ignorantly bought an alloy cog (NOS) which will wear down in a millisecond, but I'd like to know what cogs other than Campy I can use without cross-threading my hub. For those in the know, just make a list of which cogs have the same threading and which hubs they work with. Thanks!

-Kerry

[Kogswell]

I've already done a search on BF and in Google with varying results, but I just want a crystal clear answer. Could I get a listing of the groups of cogs that will work with what hubs? I have some C-Record hubs, but I'm not sure which cogs will work in addition to the Campy one I already have. I ignorantly bought an alloy cog (NOS) which will wear down in a millisecond, but I'd like to know what cogs other than Campy I can use without cross-threading my hub. For those in the know, just make a list of which cogs have the same threading and which hubs they work with. Thanks!

-Kerry

I think you're stuck w/ Campy.

Not that there's anything wrong with that.

Matthew

[12XU]

The only thing wrong with it is the trouble with which I'll have finding cogs.

[baxtefer]

some please correct me if I'm wrong, but isn't ISO/Italian cog threading similar enough that you can basically use any good quality cog? provided that you don't repeatedly change between types?

It's the lockring threading that's different.

stole this from sheldon brown. re. freewheels:

Type Thread Equivalent
I.S.O. 1.375" x 24 tpi 34.92 x 1.048 mm
British 1.370" x 24 tpi 34.80 x 1.058 mm
French 34.7 x 1 mm 1.366" x 25.4 tpi
Italian 35 mm x 24 tpi 1.378" x 1.058 mm


and


ISO, English and Italian are all semi-interchangeable, but it you shouldn't go back and forth between different types of freewheels on the same hub repeatedly

[ultraman6970]

If u r using Campy hubs get I.S.O/italian cogs they will fit fine no problems so far

U have them in aluminum, titanium or regular steel, the next option is figure it out what kind of chain r u using. road one or regular bmx/track bike

Stuck with campy or shimanos those are fine althoug in the market there is a bunch of other brands that wil work fine... almost every manufacturer is useing ISO standar threads, I have seen any french thread in centuries... not even in the stores. U can even put miche cogs in a campy hub obviously u need the miche adapter...

G.luck

[12XU]

I just wasn't sure if Campy hubs use some sort of "deviant" English threading that is almost like English, but different enough to cause cross-threading/compromising of threads if any cogs other than Campy were to be used. Thanks for the help guys/girls.

[WithNail]

The only thing wrong with it is the trouble with which I'll have finding cogs.

where do you find campy cogs?

[11.4]

The lockrings (Campy, Japanese, or Mavic) are the biggest issue. However, please do note that you can have premature thread wear problems when putting a British-threaded cog on an ISO hub, or vice versa. You tend to plane off the lands on the individual threads, so they eventually become quite shallow and can strip. It's one of the more common reasons why people end up stripping threads.

Phil Wood makes a big point of this. Go to http://www.philwood.com/pproducts.htm and then click on the track hubs under the product listing. You'll get a short essay on plated cogs and ISO cogs.

Personally, I've found that when I properly match the cog to the hub, it just spins on without a hitch. When I cross-match, it goes on, but at best it needs a little force and at worst needs a chain whip. And after crossmatching I can see that the threads aren't as happy. Nothing stripped, but lesson learned.

[Ceya]

where do you find campy cogs?


second hand, Campy no longer makes cogs for track bikes. Their steel ones are good to go. The light alloy ones stay away they are too light and after about 3-5 rides they look like they are melting away.

Suntour and Dura Ace work with Campy.

S/F,
CEYA!

[12XU]

Oooh, Dura Ace works perfectly with Campy or just kinda? I have a Campy alloy cog that will make its first and one of its last apperances at the Major Taylor drome come this spring.

[Ceya]

I have 8 set of campy records (Nuevo,Super and C rec) 2 have Campy Steel cogs, 2 have Suntour and the rest are Dura Ace.

It is easy to do spin it on andlock it down then put lock ring on and ride. You will tell if it doesn't fit.

S/F,
CEYA!

[bitingduck]

I have a DA 15 cog screwed on my campy hub right now (I also have DA hubs, and an old specialized Tri-spoke). It threaded on nicely and I just use the chain whip to snug it at the end.

I'm not sure there's much point to an alloy cog-- it will have to be retired to keychain duty pretty quickly.

[12XU]

Alloy cog, as explained in another thread, was a senseless 1980s weight shaving fad before titanium and carbon fiber, not that Ti or carbon fiber cogs would hold up better or anything.

[bitingduck]

It's kind of silly to shave weight on a track bike right now anyway with the current UCI rules. I know people who don't have particularly lightweighted bikes who had to add mass to their bike at nats -- things like taping wrenches to the top tube.

I ride a heavy-ass steel Pinarello, but it's stiff and indestructible.

[Mike T.]

I'm not sure which cogs will work in addition to the Campy one I already have.
All I can say on the subject is this - both my DuraAce cog and my Miche splined system work just fine on my Campagnolo hub.

[ultraman6970]

Campy, miche and Shimano titanium cogs work fine over either on campy, miche or shimano durace track hubs.

As somebody said, the problem are the lock rings some of them are somehow different so be carefull with that ok?

:)