i'm looking to see if anyone have a link to a freewheel adapter that screw on to the freewheel treads. So it push the fixed cog or bmx freewheel and create a straight chainline. i saw it on ebay last week but couldn't find it. i have a hed disc w/ freewheel treads that i want to convert to a fix but the chainline will be way off without the adapter. also i'm think about having a machine shop machining a similar piece but with a reverse tread on the outside for the lockring. do you know how much does machine charge please help. thanks

unless there's some way to lock the adapter as well, there's no point in putting a lockring on the adapter...

oops, i find the link to the adapter but the adapter doesn't have reverse lock ring treads on the outside. Do anyone have any idea if i can have the machine shop make the same adapter with an extra lockring tread for around $40 becasue that is what they are charging on ebay???

well i'm planning to loctie or JB weld the adapter to the freewheel so i can change the cog and have a peace of mind that the cog is not going to spin off with the lockring holding on the cog and JB weld holding on the adapter. Right???

The reason that the freewheel adapters do not have a reverse thread for the lockring is that it would spin off the whole adapter from the freewheel.

but the JB weld is going to hold onto the freewheel tread, Right?? i not planning to do any skid, mainly for track use.

maybe-probably. try it but forget about the lockring.

Hed sells one directly. I got it for about $40 without the axle.

JB Welding it seems like a good way to ruin your wheel. I tried it on my wheel and it kept spinning off and eventually ruined it. You don't really need a lockring on the track unless you're doing match sprints, and the guys you race against like to slow down A LOT (which is unlikely).

Use the rotafixa method and just get the thing on there tight, you'll be fine with just the adapter.

with this sort of setup, i'd stick to track use. not just "mainly," but exclusively. don't resist, you might spin the cog off. jb weld or red loctite might hold up against resisting, but you never know...

anyway, if it's for track use, there's also the rotafixa method of securing a track cog w/o a lockring. seems to me in one fell swoop you can secure the track cog onto the threaded adaptor, and the adaptor to the hub, all in one fell swoop:
https://204.73.203.34/fisso/eng/schpignone.htm

however, you might be able to pull the cog off the adaptor... or the adaptor off of the hub... but i'm not sure if you could do both easily. and if the cog comes off the adaptor, you might have an awful tough time getting the adaptor off the hub...

i'm little bit confuse. So hed sell an adapter that correct the chainline issue? all i see on the hed website is an track axle kit and didn't see how it would correct the chainline.thanks

You have to email and ask. They have it (I know because I've owned one).

As for trouble getting the adapter on/off, there are flats for you to wrench on. Beefy ones, too.

You could probably get a cheater bar on there and put some serious torque, though you probably risk messing something up. Anyway, like everyone else as said, don't be thinking you can do this on the streets, it won't work. I know because I have tried and unthreaded it, even with JB weld.

This is more a warning to lurkers and net surfers thinking they'll use this adapter as some sort of convert-my-rear-into-a-real-track-hub piece of magic.