In Newtown, standard tyre booking times tend to be about 30-60 minutes to fit 2 tyres, and 45 to 90 minutes to fit 4 tyres depending on the condition of the wheels, the type of garage, and if balancing is need. Add extra time to your booking if you're getting other services done like valve changes or alignment checks.
For next day fittings in Newtown, it only really applies to popular size tyres, however it still depends on the stock at the fitting centre and how flexible their schedule is. You can check and book the earliest available appointment times at local garages.
The availability of mobile tyre fitting services can vary within Newtown and surrounding areas. After you've entered your car registration or your tyre size, you will be able to see mobile fitting services that are available to you and what time slots are vacant. That will depend on your postcode.
The easiest is to enter your car registration. This helps us identify the correct size and the specifications of the tyre. If you do not have that, you can manually enter a tyre size (205/55 R16) and check your car's handbook to confirm what the load and speed ratings are if you have any doubts.