Anyone Done Fixed Wheel Conversion Using Bottom Bracket Lock Nut

[BADGER.BRAD]

Hello ,
Just wondered if anyone had tried the fixed wheel conversion on a standard wheel using a bottom bracket lock nut to stop the sprocket undoing ?
http://sheldonbrown.com/fixed-conversion.html thinking of doing this on my cheap ride to work mountain bike, the gears are worn as are the sprockets in fact they were never any good in the first place.

 

[dudi]

my fixie doesn't have a lockring.

I just decided on what spocket i wanted, decided i wouldn't change it and did it up super Feckin tight.

I dont need a lockring as I use a brake for most of my stopping, but I did try the BB lockring, it didn't work as there wasn't enough thread showing.
Does this only work on hubs designed for a screw-on freewheel?

 

[Ivan Ardon]

Yes, I've done it and it works fine. I've loctited the sprocket and lockring to the hub for extra peace of mind, but it shows no sign of undoing even when presented with my not-insubstantial bulk.

 

[rustychisel]

Yes, a number of times. It's known as a 'suicide hub', but that's if you're a muppet or love skidding, in which case you'll destroy your threads most likely. Since it threads on the same way and there's usually only 2 or 3 threads or so to engage, a BB lockring is fairly pointless, even for snugging down the cog, which will be feckin tight after a few rides anyway. I use them for aesthetic reasons mostly.

 

[GilesM]

Yes I've done this, no problem, once you've ridden the bike a few miles after putting the fixed sprocket on it will be well locked in place, I tighten the lock ring up after a the first ride, but I don't think this was essential.

Does this only work on hubs designed for a screw-on freewheel?

Yes.

Giles

 

[BADGER.BRAD]

Many Thanks All

Many Thanks all, much appreciated. My real fixie has no lock rings so what you have said about not needing them makes a lot of sense.

 

[Mr Phoebus]

Another fixer here who's never used a lockring in over 28 yrs and is still here to tell the tale.