Want to change 15" to 16" tires: ABS possible issues

The prius comes in 16" rim tires, in the touring model.
E.g. ebay example
08 Prius 16" Original Alloy Wheel 7 Spk, 5 Lug & Cover : eBay Motors (item 290468952467 end time Sep-26-10 20:47:16 PDT)

Does your perfect 16 wheel match this identically? Other parameters like bolt pattern and offset have to match . It would be safest to buy a touring model wheel that is made for the prius. Don't know why the 'Toyota people' did not mention this possibility. You can go after market, it just has to have the same parameters as the stock 16" wheel.

In my understanding, the only problem with ABS is when a different circumference sized tire is run in the set, for example, when running with smaller tire that is the spare, the car will only go about 50 mph if I recall correctly because of the size difference.

 

I don't think you'll have any problems as long as the overall circumference of the new tire/wheel combo is close to the same as the OEM 15" combo. There are tons of people here running aftermarket 17" wheels and I've not seen many complaint of problems! Also, different brand tires in the exact same size can vary several millimeters in circumference, so the ABS system has a tolerance range to accommodate replacement tires. If it didn't you'd be hosed, because some OEM tires are not available to the consumer through the normal retail outlets.