Tires sizes for BETA 450 RS 2010

90/90-21
FRONT
~21 PSI
120/90-18
REAR
~26 PSI
BETA 450 RS 2010 Tires Specs
Front Tire Dimensions 90/90-21
Rear Tire Dimensions 120/90-18
Front Tire Pressure 21 PSI
Rear Tire Pressure 26 PSI

What are the tires sizes for BETA 450 RS 2010?

The front tire is 90/90-21, and the rear tire size is 120/90-18

What are the tires pressure for BETA 450 RS 2010?

The front tire pressure is about 21 PSI (~1.45 BAR), and the rear tire pressure is about 26 PSI (~1.79 BAR)

For accurate numbers you should always consult with your bike user manual's, your local dealer or the manufacturer