It would be unfair to give a verdict here as the Tata Hexa is not launched yet. So, we would suggest you to wait for the official launch and stay tuned for future updates.
For the availability and prices of the spare parts, we'd suggest you to connect with the nearest authorized service center. Click on the link and select your desired city for [service centers@https://www.cardekho.com/Tata/car-service-center.htm
As of now, the brand has not made any official announcement on the price of Hexa but we can expect it to be around Rs.14.00 Lakh (Ex-Showroom). Stay tuned
As you are looking to replace the tyres of your car, we would suggest you get in touch with the authorized service centre of Tata.[Service Centre@https://www.cardekho.com/Tata/New_Delhi/car-service-center.htm
