Check the size printed on the tyre sidewall and match it to your handbook or the tyre information sticker (often on the driver door shut or fuel flap). Make sure the full marking matches, including any C, XL or load and speed rating requirements, before ordering.
If your current tyres are marked 175/75 R16C, your vehicle is set up for a commercial casing with higher load capability, which is common on vans and work vehicles. Choose the C version again unless your vehicle manufacturer specifies otherwise, because changing to a standard construction can reduce load margin and alter the way the vehicle feels under weight.
Those alternatives change the overall rolling radius and width, which can affect speedometer accuracy, wheel arch clearance and gearing. Stick to 175/75 R16 unless your vehicle manufacturer lists an approved alternative size, and check with your insurer if you plan to deviate from the original specification.
Select a load index and speed rating that meets or exceeds the figures shown on your vehicle placard or handbook. This matters particularly with 175/75 R16 because it is often used on vehicles that carry tools, payloads or conversion weight, so an under-rated tyre can overheat and wear faster.
All-season tyres can suit 175/75 R16 if you want one set to handle wet roads and colder months, especially if you look for the 3PMSF snowflake symbol rather than relying on M+S alone. If you mainly drive in warmer conditions with heavier loads, a summer tyre may feel more precise and resist wear better, while winter tyres are best reserved for regular sub-7C driving or rural routes.
