Use non-TPMS 15" wheels on Gen III?

Yes, you will just have to ignore the TPMS warning light on the dashboard.

SCH-I535

 

A little black electric tape , over the TPMS yellow warning, and no little warning , unless your state has vehicle inspections , then ??

 

Does the lack on tpms on snow tires affect any other systems in the vehicle?

 

No, it is simply there to let you know when a tire is low on air pressure
I have gone through two winters here in tropical Buffalo NY with no TPMS snows.

 

Thanks. Does the tpms reset automatically when you reinstall the factory rims? My Fit did. I trying to decide between dedicated snow tires or a better all season LRR tire. We don't get the same volume of snow on the prairie as you do in Tropical Buffalo

 

Yes your all set when you refit your summer wheels .
I have been very happy with my Michelin Ice dedicated snows, the mpg hit is ~ 2 mpg (I run them 42psi front, 40 rear)
If I am not mistaken my car actually picks up the tpms signal from the tires stored in the rafters overhead in my garage and doesn't give me a tpms error for 20 minutes or so during the winter.

 

Thanks for the info. I think I'll go the snow tire route.