Are there Toyota-approved rims smaller than the 17-inch ones that come standard? 15 inches? The 17-inch ones keep getting damaged by potholes!
Paula, you don’t need Toyota approved rims. Any good tire and wheel shop will know what size you can put on your vehicle .
Look here;
https://www.tirerack.com/wheels/results.jsp?&autoMake=Scion&autoModel=tC&autoYear=2010&autoModClar=
They have both 15 ans 16 inch wheels that fit and tires to go with them. Not the only site that does this.