I check it out online and saw someone on ebay selling the same zz custom tire and wheel kit...and compared it to those in the photos...they all seem to match...all down to the tire threads...
Here's the link to that ebay page with the wheel kit...
http://cgi.ebay.com/ws/eBayISAPI.dll..._BIN_Stores_IT
anyway are there any other toy cars out there which tires can be used on the zzse and the zzmts?