Just check the tyre size guide diagram to establish how to complete each box if you are in any doubt. You can ignore the letter R between the profile and diameter. This letter means the tyre is a Radial and this is a throwback to the days when you could still buy crossply and radial tyres for vehicles.
When you click the SUBMIT button, you will be shown the prices of mobile and centre fitted tyres in your size. Just SELECT the tyres and fitting option you would like and complete your tyre order request.