26x11.5x17 MT ET STREETS??

I've heard about these new Mickey Thompson ET Streets in 17" and I did some researching and I can only find them in 26x11.5x17...

Do they sell anything less wide, if not do you think it's safe to run them on a 17x8" rim?

Not really going to be daily driven with them on, just on the weekends most likely.

-Thanks.
 
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