This size is usually a rear fitment on high-powered sports cars with staggered wheels, where a very wide tyre is needed for traction. A well-known factory example is the Porsche Carrera GT on the rear axle. Always confirm the exact size, load index and speed rating on your vehicle placard or handbook before ordering.
Most 335/30 R20 tyres are designed for wide 20-inch rims, commonly around 11.5J to 12.5J depending on the tyre model. Check the wheel width stamped inside the rim and match it to the tyre manufacturer’s approved rim-width range. If your wheel sits outside the approved range, choose a different tyre option to avoid handling issues and uneven wear.
Follow the minimum load index and speed rating specified by your vehicle manufacturer and never choose lower values. Many tyres in this size are offered with high performance ratings (often Y or (Y)) and varying load indexes, so it is important to match what your car requires. If you are comparing options, prioritise an exact match to the OE specification for the most predictable handling and compliance.
Availability is limited because this is a specialist performance size and most products are summer-focused. If you do find a winter or all-season option, fit matching tyres across the same axle and keep the correct ratings. If none are suitable, many owners run a separate winter wheel and tyre package in an alternative manufacturer-approved size.
Yes, replacing tyres in pairs on the same axle is strongly recommended to maintain consistent grip, braking and stability. Ideally, match the brand and model side-to-side, especially on a powerful rear axle where differences in compound and construction are more noticeable. If your vehicle uses staggered sizes, keep the correct front and rear sizes and replace in axle pairs rather than mixing tread patterns.
