I am working a bike which is a fixed gear bike, but I am building a rear wheel that I can swap with it so that it can have gears. Therefore I have built up a wheel with a 5 speed Sturmey Archer hub.
However, I have a problem with the chain line. The rear sprocket is too far from the centerline, too close to the chain stays. The cog is already flipped in the direction that puts the teeth closest to the middle. Currently the misalignment is approximately 6.8mm.
I measured the amount of threads on the drive side of the axle and it seems to be just enough for all the bolts and spacers and my frame with no extra room. I was thinking that I could just swap some of those spacer nuts around but it doesn't seem like I have room for it. The only way this would be possible is if I can shift the axle to make more threads. Is this possible? Something tells me it isn't.
The other option is to use chain ring spacers, which I would like to avoid if possible because it wouldn't look very good.
Is 6.8mm chainline misalignment too much for a internal gear hub? I guess it is for a fixed but on a fixed the chain is tighter as well.