265/70 R18 means the tyre is 265 mm wide, has a 70% profile (sidewall height), and fits an 18-inch wheel. The overall diameter is about 828 mm, so it is a relatively tall tyre that can add sidewall cushioning compared with lower-profile 18-inch sizes. Always confirm the full specification, including load index and speed rating, against your vehicle placard.
265/70 R18 is around 26 mm larger in overall diameter than 265/65 R18, which is roughly a 3.3% increase. That can affect speedometer reading, gearing, and clearance around wheel arches and suspension, especially on full lock or when the vehicle is loaded. Check manufacturer guidance and ensure there is enough space before ordering.
For mainly tarmac driving, a road-focused 265/70 R18 will usually be quieter, more fuel-efficient, and better in wet braking. If you regularly drive on gravel, fields, construction sites, or green lanes, an all-terrain 265/70 R18 can offer stronger grip and a more robust casing, with a small trade-off in noise and rolling resistance. Match the choice to how often you really leave the road.
265/70 R18 is often used on heavier SUVs and pick-ups, so the correct load index is critical for stability, braking, and tyre life. Use the vehicle door jamb sticker or handbook as the primary reference, then select the same or higher load index and the correct speed rating. If you tow or carry payloads, prioritise the specified load capacity and run the recommended pressures.
Some 265/70 R18 options come in LT (light truck) construction, designed for higher loads and tougher service such as towing, frequent payloads, or rough tracks. LT tyres can feel firmer than passenger or XL tyres, so they are best chosen when you will use the extra strength. If your vehicle specifies standard or XL fitment, stick to that specification unless you have confirmed an approved upgrade.
