stretch cruiser rear wheel dropouts

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My dynos dropouts have been stretched to far apart to the point the axle is misaligned and rear wheel doesn’t sit straight in the dropouts, i’ve had to add an extra nut to the coaster brake arm tire just so the tire would somewhat sit straight

Could somebody possibly point me in the right direction on how to possibly fix this issue?
I keep getting the runaround and I don’t wanna mess it up anymore than it is
 

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Did this bike come with a single speed? If it was new with a wider rear axle, like a 5 speed or more then the width would be greater. To narrow the width, you could remove the wheel and manually squeeze the drops together to match the width of your rear hub. If you do that, then be sure the dropouts are exacty perpendicular to the axle nuts. The may be at a slight angle because they will be closer together. You can make up something to get it just right.
 
My dynos dropouts have been stretched to far apart to the point the axle is misaligned and rear wheel doesn’t sit straight in the dropouts, i’ve had to add an extra nut to the coaster brake arm tire just so the tire would somewhat sit straight

Could somebody possibly point me in the right direction on how to possibly fix this issue?
I keep getting the runaround and I don’t wanna mess it up anymore than it is
Did this bike come with a single speed? If it was new with a wider rear axle, like a 5 speed or more then the width would be greater. To narrow the width, you could remove the wheel and manually squeeze the drops together to match the width of your rear hub. If you do that, then be sure the dropouts are exacty perpendicular to the axle nuts. The may be at a slight angle because they will be closer together. You can make up something to get it just right.

We tried to put a 3 inch rim but it was to thick and was rubbing, so now I’m trying to go back so thank you for the suggestion, I’ll definitely be trying it in the morning!
 
We tried to put a 3 inch rim but it was to thick and was rubbing, so now I’m trying to go back so thank you for the suggestion, I’ll definitely be trying it in the morning!
I’m still having trouble with coaster brake arm mounting area there’s a gap without the small nut I’ve used as a spacer

I’ve tried over and over squeezing the chainstays together,no luck
 

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I’m still having trouble with coaster brake arm mounting area there’s a gap without the small nut I’ve used as a spacer

I’ve tried over and over squeezing the chainstays together,no luck
The large nut and washer on those hubs gives a little too much space between the arm and frame.
You could try a thinner nut and or washer to narrow that space.
Untitled.jpg
 
Try to swap this nut to the other side. The nut holding the cone on the drive side should be narrower and maybe give you enough to line up the brake arm.
That will move the wheel over to the left but there may be enough room between the stays for the tire to fit. The chain line may be ok too, if not, the cog and chain wheel are usually concaved out or in and can be flipped to get a straight line.

If your spacer is bolted down tightly it should work but the spacer, bolt and washers would have to be heavy enough hold the force of braking.
brake2.jpg

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