I know about the Sturmey Archer hub. But I'm thinking derailleurs. My bike is a conversion so I could easily put a rear derailleur on there to tension the chain but would it work? I'm only about a week into riding fixed and it's not the coasting that I miss but the ability shift.

Wouldn't work. When you back pedal it would eat your derailleur. That being the first problem.

What Nagrom said. Someone has to invent a new deraileur system for that to happen.

It's been done, it's called a 2 speed crank. Works like an IGH 'cept gives the chainring 2 ratios. Latest incarnation is the Metropolis but they've been around since the teens.

Hmm. I see. My thinking was having a 2 ring road crank and using the RD as just a chain tensioner. Oh well. Thanks for the advice.

What is wong with the Sturmey if you want gears?

Way too easy.

The only problem with the Sturmey Archer is that I don't already own one.

Alright, but the main problem with what you're suggesting is that it's not possible.

Didn't Mercier make a 3 speed fg? That worked and was possible

Yup, and it used an Sturmey Archer internally geared hub, not a derailleur as the OP is suggesting.

A fixed system with a functional shifting derailleur is theoretically impossible within reason/ sustainability.

And thats why my original post asked "will it work?"

No.

Fix THAT:
https://www.amazon.com/Sturmey-Archer...1&keywords=s3x

The Metropolis crank is an internal gear 2 speed crank ( ie. ring ) so you don't need the RD.

So you could have a 6 speed fixie if you used the SA fixed hub? would there be any problems?

The complete loss of simplicity that comes with riding a fixed gear, by using two internal-gears hubs at the same time?

Has anyone tried one of these hubs, seems like there would have to be some backlash in the gears.

I've got one. There is a little backlash, but you get used to it. To me it is worth it to have 3 usable gears - 58, 70, and 93.

Front wheel: Sturmey Archer X-FD 70mm Drum brake, 36h, 3x 2.0 straight gauge spokes, Sun CR18 rim, brass nipples.
Rear wheel: Sturmey Archer S3X 3sp fixed hub, 36h, 3x 2.0 straight gauge spokes, Sun CR18 rim, brass nipples.




OP looking for a S3X wheel...? I gots one for sale. Details in this thread.

I'm not so interested in gears that I'm looking to spend money on it but thanks for the heads up. I just thought I was on to something. It won't work, oh well.

There is a little lash, like riding a fixed gear with a slightly loose chain, but I don't find it bothersome.

Somewhere in my stash in Houston, I have a Dana three speed crank system? I imagine it "might" work with a fixed gear. I never got it hooked up to see if it the crank freewheeled or not. The main problem, it's ugly as hell.,,,,BD

https://www.gardengrapevine.com/Dana-00.jpg

It would be awesome to run ancient Campagnolo Corsa with a custom fixed cog.