215/40ZR17 Kumho Ecsta Ps31 87WDrive assured with the 215 40ZR17 Kumho Ecsta Ps31 87Wengineered to balance control, comfort, and durability. Built by Kumho, the ECSTA PS31 emphasizes balance: grip when you need it and comfort when you want it. Blackwall sidewall construction helps the tire resist routine wear while keeping the aesthetic understated and refined. An adaptive tread geometry helps evacuate water, stabilize cornering forces, and support braking when conditions shift.