Just got a new rear wheel and I am transferring over my old lockring and cog. The cog threaded on by hand easily (I will tighten it later), but the cog won't go on very far at all. It threads on by hand just fine on my old hub. Do I have a bad hub? Do I risk stripping the threads if I grease and tighten with a lockring wrench?

Thanks for any info.

What's the hub and cog? Certain hubs and cogs and lockrings do not mix.

Lockrings are reverse threaded. You're spinning it in the right direction, right (counter clockwise)?

If you have a Campy of Phil hub with 33.5mm lockring threads, then an english lockring like a Dura Ace won't fit, because it's slightly smaller.

If you have a Campy or Phil hub and don't know which direction a lockring threads on, you may not deserve your rear hub.

Yes, Always set in the threads first then apply torque. Like a car, You dont want to just put the lug nuts on the thread and take a impact drill to it. Because you might end up stripping the threads, Or damaging them, You should be able to thread the whole lock ring down to the cog, where the lockring and cog are flush to eachother, Then you can apply torque.

I can't believe that you actually just provided relevant input.

I'd be careful, I had a similar experience with a lockring. I got it halfway then it wouldn't move, so I used a lockring too to tighten it. Realized too late that it was on crooked, and I ruined one side of my hub and lockring.

Thanks for all the replies. The lockring threads are left handed an I am turning it the right way. I was doing it without grease just to test the threads in case an email was needed. It screwed onto my old hub easily without grease (the hub was clean too) so I was worried I might have a bad hub. Anyway, I called the wheel seller, Bell's bike shop and they advised me to give it a try and they would replace it if there was a problem. So I greased it and it seems to have gone in fine by hand and then tightened fine with the lockring wrench. Bells was great so far highly recommended.

Yeah, Bell's is usually really good to deal with.

Make sure your cog is as tight as humanly possible, then crank down on your lockring before riding.

The lockring is pretty vital to your bikes performance. So make sure you do it right.

wipe the threads with a towel and maybe use some degreaser, then put on new grease.

It's always a good idea to grease the threads of the cog and lockring (and most other threads on a bike for that matter.) Grease will allow you to get everything tighter and it will go together more smoothly. You'll also be able to get it off easier in the future.

If it doesn't go on by hand don't force it. Use very light force if necessary, because maybe the threads aren't perfect.

Hahaha!

Especially funny when phil lockrings tell you the directions to turn.