What is the front disc brake size of Yamaha Ray ZR?

The front disc brake size of the new Yamaha Ray ZR is 170 mm. The hydraulic single disc brake is an option and the variant loaded with it comes with a price tag of INR 54,500. The drum brake variant costs just INR 52,000. For this INR 2500 Yamaha also offers a good looking set of alloy wheels, making the deal more valuable for the higher spec variant. It comes with a certified mileage of 66 kmpl and weighs just 105 kg.