Questions about stock steel wheels and wider wheels

[texas pinzgauer]

A friend has introduced me to a shop that does lots of custom steel wheel fabrication work for motorsports applications. The friend thought they could probably fabricate wider steel wheel for the Pinz very cost effectively.

I have two questions about this:

Is the stock wheel is 5" X 160 mm?

Is there a "reasonable" limit to how wide a wheel that could be used for a Pinz without causing problems like wheel bearing failures or things of that nature?

I'd like to go wider to have more tire options but I don't want to tear up stuff that seems to be working just fine as is.

Any thoughts on this subject would be appreciated. BTW - I've shared with the wheel shop that there are others who might have an interest in these wheels if they're cost effective and don't cause incremental problems so this might be a good source for all of us to consider.

Thanks.