Generally, fitting a new tyre takes between 30 to 60 minutes. This, of course, depends on how many new tyres need fitting, and if there are any complications such as wheel nuts being seized or valves being damaged. When you book an appointment consider that there could be a wait time, and remember to ask the garage staff if you want to have the wheel alignment checked as well.
It is usually possible to book next day fitting in Belper, subject to stock and local garage availability. Simply enter your registration or tyre size and you will be shown the next available fitting time for your chosen tyres.
Mobile tyre fitting has local variability and also depends on the type of tyre and the date needed. The easiest way to check is to perform a search. If a mobile fitting option does not show up during booking, that service is not available. You can still opt for a fitting appointment at a Belper garage.
To find the right tyre size, the simplest option is to go by car registration. Alternatively, you can check the tyre sidewall (for example, 205/55 R16) or the vehicle handbook, and look up options based on the tyre size that you find.