Toyo Proxes 225/16

I am not sure what you are asking but I measured my 2015 Roadster and the gap between the plastic and 1st ridge is 5mm.

Yours looks fine from the photo. As long as the rear wheel axle spacer on the other side is on correctly (grooves inward towards rim) and nothing is binding it should be OK.

drive unit.JPG

I didn't know how mm were effectively, for I never done with meter.
So I thought were less on my 2010 R, precisely 3mm rougly.
I hope it's so you think. I believe it's correctly inside wheel, I will check however.
 
Be careful if changing the total diameter of the tyres if you have ABS.

I quote your thought for I noticed something different removing Metzeler even..
So with motorcycle tyres too moreover with not different size..
 
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