the 225/50-16 size tire is an old size, dating back to the late '70s, yet there are many choices in that size today. I think this is because that particular tire was used on several high & low volume produced vehicles.
My point in bringing that up is it seems the best strategy would be to select tires for which there will be a reasonable demand long into the future, i.e. those used on high volume production autos, or a size common to many low volume production vehicles.
The tire industry has gone through a period of rapid developement & change over the last 20 years regarding aspect ratios and widths, I personally would think sizes will have to stabilize sometime in the near future, there simply isn't a need to continue the trend of lowering profiles, increasing wheel diameters or widening treads.
Or am I just showing my age?
I will be interested to learn what sizes you decide to go with.
George
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