T1R? Should have at least use R1R at least since these are racing cars.From their FB page:-
Toyo Tyre Sales and Marketing Malaysia is proud to be the main sponsor of the Toyota Gazoo Racing (TGR) Racing Festival, set to take place over 4 rounds in Penang, Johor and twice in Kuala Lumpur. All 30 identical, race prepared Toyota Vios sedans will be equipped with Toyo Proxes T1R tyres, a resounding testimony to the high quality and durability of these Malaysian- made tyres. This race series is scheduled to commence in August 2017