In many vehicles it is used as a temporary spare rather than a full-time road tyre. Check the sidewall for Temporary Use wording or other restriction markings, and follow the speed and distance limits in your handbook. If it is a spare, replace it with the same size and matching load and speed rating so it fits the wheel well and meets the vehicle specification.
175 is the tyre width in millimetres, so it is relatively narrow for a 17-inch wheel. 65 is the aspect ratio, meaning the sidewall height is 65% of the width, and R indicates radial construction. 17 is the wheel diameter in inches, so the tyre must be fitted to a 17-inch rim.
Match the load index and speed rating shown on your current tyre sidewall, or the vehicle placard inside the door shut or fuel flap. Avoid choosing a lower rating, as that can reduce the tyre’s carrying capacity or permitted speed. If you are replacing a spare, the ratings can be specific to that spare wheel setup, so copy the existing markings.
There is no single correct pressure because it depends on the vehicle and whether it is a spare or a road-going fitment. Use the manufacturer’s recommended pressures from the vehicle placard and set them when the tyres are cold. If it is a temporary spare, the specified pressure is often higher than the main tyres, so double-check before driving.
Choose based on how the tyre will be used and the conditions it will see. Summer tyres suit warmer months and everyday road use, while winter tyres are the safer option for regular cold temperatures and snow. All-season tyres offer a practical year-round compromise, which can be especially convenient if you want consistent capability without seasonal changes.
