na975

can i screw a EAI cog on a Miche track hub, are the threads the same or will i strip the hub??

hyperRevue

No issue.

sloppy robot

not all cogs work on miche.. but i can never remember what is what.. its been covered on here though

Retem

miche is french thread it is better to get their carrier and cog set up

dirtyphotons

new miche hubs have standard threading for the cog. it's the lockring that's different, i think bike works nyc has the carrier and cog for a decent price.

sloppy robot

the misinformation is starting to get ugly...you need this

ISO standard threads: 1.375 Inch x 24tpi (34.92mm x 1.058mm), fits English and Italian threaded hubs.

English thread 1.37 Inch x 24tpi.

im pretty sure eai's are iso and ****

jmgorman

sloppy is spot on. Miche is not French, it's not all that funny. That being said, their carrier system is really sweet.

Sin-A-Matic

This forum needs a FAQ and that question needs to be in it.

Not because I'm tired of people asking either. Because it's important and I can't remember it.

The FAQ also needs the skid patch chart.

dirtyphotons

lowest common denominator. times two if it's odd and you skid with either foot forward.

sloppy robot

i have miche hubs and i can never remember it either.. for the record i think soma cogs are ISO as well

the carrier system gets mixed reviews when it comes to skidding on it

Sin-A-Matic

So, uh, do the math for me -

I run 45 x 17

ultraman6970

Miche is iso comp. Campy cogs and shimano works fine. THe lockrings im not so sure but shimano lock ring wont work in a miche huba but the campy one will do just fine.

thanks....

Retem

okay I stand corrected I have also seen soma cogs that are a weird thread cut something in between ital and english... so it will fit both

sloppy robot

i think what youre thinking of is... iso cogs can be fit onto non-iso hubs (not sure if this is suggested...but they'll screw on..) but not vice versa

Retem

yeah I wouldn't suggest it I just stick with tha good stuffs nothing funny phil wood and suntour

killsurfcity

if it helps the op, i have primatos and i have run eai and surly cogs with no issue. as far as lockrings go, i have a miche one, so i don't know about running anything else.

humancongereel

+1. i suck at math and need an example.

trons

17 spots (cog (17) divided by highest common denominator of both (1))

humancongereel

god, i suck. i don't even understand that. why 1?

na975

ok, so the EAI cog will in fact screw on that hub right? I know that the lock ring is different thread so i bought one, i just didn't want to have to buy that carrier for the miche hub, i only want to use myEAI cog that i have on my DA track hub. thanks

sloppy robot

yes it will screw on

na975

will it screw off once i been riding for while?

grafix

I'm not certain about the official thread compatibility (ISO...whatever) but I've been using EAI cogs on my Miche Primatos for a year without having any problems with stripped threads or ceased cogs.

So, yes...they work together okay.

Aldone

Miche Hubs / cogs are 35 X 24

According to this:

https://www.fixedgeargallery.com/revi...breview/miche/

"Miche Hubs and cog-carriers use Italien threading which is 35mm*24tpi (1.378 inch), while Shimano, Formula, Suzue, Phil, etc. use BSA threading 1.370"*24tpi - which translates to 34.798mm*24tpi. Also, and i hope i'm using the correct english terms here, the thread angle on a BSA thread is 60 degrees, radius 0.17mm, while on ITA it's 55deg and 0.14mm. "

Miche works only with Campagnolo !!

dirtyphotons

continuing the above quote

"These differences are tiny, and as you said, an italian threaded cog (Miche or Campy) will thread on a regular BSA hub, but as you can see the italian thread diameter is slightly larger than BSA. This reduces the contact area, and could very well increase the risk of a stripped hub.

I've been using the Miche system on #3,058 / #2,189 for 1.5 years now and i am a fan, still i wouldn't suggest using it on a BSA hub, especially if do a lot of skidding / ride in city traffic. I may be a bit paranoid about this, but i have seen a couple of stripped track hubs. "

this is the only firsthand claim that i've seen as far as damage due to the thread incompatibility. as pointed out, the threading pitch is the same (24 tpi) but the miche hubs/cogs have a diameter (at the threads) that is ~0.2 mm larger than your DA hub. this had never caused issues for me (using a DA cog on a primato hub) but according to Dirk, Karlsruhe (Germany) it's possible.