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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 11-03-07, 05:49 PM   #1
rduenas
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HELP: Miche Primato Pista track hubs

Now, the only thing I'm familiar with when it comes to English vs. Italian is bottom brack threading. Does this carry over to rear hub threading?

I'm getting a wheelset built laced to Miche Primato Pista hubs. Will I run into any issues with cog compatibility? I have Soma track cog/lock ring.

Orrrr am I just being paranoid?
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Old 11-03-07, 07:36 PM   #2
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Come on, guys. This is wrecking my brain.
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Old 11-03-07, 07:43 PM   #3
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All cogs have the same threads, as far as I know.
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Old 11-03-07, 07:51 PM   #4
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Cog threading is ISO. but ISO threads are "close enough" to BSC threads so that threading on your Soma cog is ok. Just don't repeatedly switch between ISO and BSC threaded cogs

Miche lockring threading is Italian. Your Soma lockring will not work. Get a Campy, Miche or Phil lockring.

11.4 is of course the guru when it comes to hub threads

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This should be a sticky.

Cog threads can be French, ISO, or BSC (British). French disappeared from the scene 40 years ago, so you don't have to worry about them on any modern hubs. ISO and BSC are similar, but not quite identical. In particular, they differ in the depth of the threads, so mismatching can cause you to shave off the tops and a bit of the sides of the threading on the hub. If you (or somebody) has already done the mismatch, then you've already shaved the threads slightly so yes, the wrong cog will spin on just fine. You have just increased the risk of stripping somewhat.

To add to the problems, some cogs are subjected to hardening treatments that gunk the threads up with stuff that prevents them from fitting properly (Suntour Superbe Pro cogs are particularly bad at this). If you use a brass brush and clean out the threads, this problem goes away. Oh, and you can have a ding on your cog threads which can prevent it from fitting any hub properly without messing up the threads.

On to lockrings: There are three versions, Campy, BSC (English) and Mavic (French). The Campy lockring works on Campy, Zeus, Gipiemme, and the various Campy clones (and on Phil Wood, by the way). BSC is ubiquitous on all the Japanese hubs and most others. Mavic is unique to Mavic and is almost, but not quite, a BSC thread -- some people use a BSC (Dura Ace) lockring in a pinch and since you aren't torquing it like a cog, you might get away with it, but Mavic lockrings are cheap and readily available from John Dacey at Business Cycles.
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Old 11-03-07, 08:14 PM   #5
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All cogs have the same threads, as far as I know.
Incorrect.
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Old 11-03-07, 08:24 PM   #6
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sunshine njs hubs use a campy lockring right?

sounds stupid but the dura ace njs lockring i have will not fit
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Old 11-03-07, 08:38 PM   #7
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Incorrect.
Oops
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Old 11-04-07, 12:17 AM   #8
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I faced the same exact problem when I built my wheels with the miche hubs, me and my lbs concluded that it "would work" but I didnt want to run the risk of potentially messing up the threads. So I went with the miche adapter and cog and I LOVE IT, so easy to change cogs, NO CHAINWHIP. Just buy the adapter and cog from miche, you'll be glad you did.
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Old 11-04-07, 02:28 AM   #9
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I use both Campy (ISO) and EAI (BSC) cogs on my Formula (BSC) hubs with no problems. Using a BSC cog on a Miche hub also shouldn't be a problem.

Last edited by Ziemas; 11-04-07 at 07:24 AM.
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Old 11-04-07, 03:11 AM   #10
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Thanks for all the feedback, guys. For now I'll keep the cog, then sometime in the future I'll something correct and better quality.



Quote:
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I faced the same exact problem when I built my wheels with the miche hubs, me and my lbs concluded that it "would work" but I didnt want to run the risk of potentially messing up the threads. So I went with the miche adapter and cog and I LOVE IT, so easy to change cogs, NO CHAINWHIP. Just buy the adapter and cog from miche, you'll be glad you did.
I thought about that, but I'd never change my cog. And it seems like it'd be less secure than the regular way.
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Old 11-04-07, 03:32 AM   #11
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Using a BSE cog on a Miche hub also shouldn't be a problem.
Quick, someone ban the export of British cogs
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Old 11-04-07, 07:25 AM   #12
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Quick, someone ban the export of British cogs
Whoops! Fixed.
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