About 175/40R21 Tires

The 175/40R21 is a relatively uncommon and specialized tire size that is primarily found on certain European compact and subcompact vehicles, as well as some electric vehicles designed with narrow, tall tires to improve aerodynamic efficiency and reduce rolling resistance. Models such as certain variants of the BMW i3 and some Renault electric vehicles have been known to use narrow, high-profile tire configurations similar to this size. Due to its niche fitment, availability is more limited compared to mainstream tire sizes.

At the budget end, Nankang and Sailun occasionally produce tires in specialty sizes like this and can offer a cost-effective option for price-conscious drivers. For mid-range quality, Hankook and Continental sometimes manufacture this size, providing a reliable balance of performance and value. At the premium level, Michelin or Pirelli, when available in this fitment, deliver superior ride quality, longevity, and handling characteristics.

Treddur is currently tracking 15 listings for 175/40R21 tires. Prices range from $55.08 to $146.99 depending on brand and retailer.

Because this is a low-volume specialty size, shoppers should purchase well in advance of seasonal changeovers rather than waiting for last-minute deals, as stock can be very limited. End-of-season sales may offer modest discounts, but selection is often the bigger concern than timing.

Due to the low production volume and specialized nature of the 175/40R21 size, prices tend to run higher per tire than comparably performing mainstream sizes, with limited discounting and occasional supply shortages driving costs upward.