Yes, the tyre speed rating does matter when purchasing car tyres.
Speed rating is a measure of the maximum safe speed that the tyre can support. It is represented by a letter code that corresponds to a specific speed range. For example, a tyre with a speed rating of "V" can support speeds of up to 149 mph, while a tyre with a speed rating of "H" can support speeds of up to 130 mph.
If you frequently drive on motorways, it is important to select tyres with a speed rating that can support your vehicle's maximum speed. This may all seem a moot point given the speed limit in the UK has a maximum speed of 70mph. However, selecting a tyre with the correct recommended speed rating also can help with the ride comfort and noise levels.
If you are unsure as to which speed rating you require for your vehicle – check your car’s handbook or contact the vehicle manufacturer.