About 155/35R21 Tires

The 155/35R21 is a relatively uncommon and specialized tire size most often found on certain European luxury and performance vehicles, particularly some configurations of the Audi A8 and similar full-size luxury sedans that use staggered or space-saving fitments. This narrow, high-aspect-ratio size on a large 21-inch wheel is sometimes used as a temporary spare or run-flat replacement on high-end vehicles. Availability is more limited than mainstream sizes, so confirming fitment with your vehicle manufacturer is recommended before purchasing.

At the budget end, options are very limited for this specialized size, but Nankang occasionally produces tires in uncommon dimensions and may offer a cost-effective solution. For mid-range buyers, Continental and Hankook are reliable choices that balance performance and durability for luxury vehicle applications. At the premium level, Michelin and Pirelli are the top recommendations, as they are commonly OEM suppliers for the luxury vehicles that use this size and offer superior ride quality and handling precision.

Treddur is currently tracking 4 listings for 155/35R21 tires. Prices range from $125.07 to $476.21 depending on brand and retailer.

Because this size is used on a narrow range of luxury vehicles, seasonal sales events like Black Friday or end-of-quarter promotions may offer the best opportunities to find discounts. Stocking up or ordering in advance is advisable since limited retailer inventory can make last-minute replacements difficult.

Due to the low demand and specialized nature of the 155/35R21 size, prices tend to be higher per tire than comparably sized mainstream fitments, with limited discounting and frequent stock shortages driving costs upward.