Just bought a 2013 S85 for my wife and drove it back to CO from MO and am looking to swap out the set of 21" dark grey turbines preferably for a set of 19" slipstream. These 21" have the old tpms that do not show individual tire pressure. All 4 are in great shape with only a small rock chip/rash spot on one shown in pic. Just had them checked today, two are at 3/32, other two are at 7/32 having been more recently replaced. 21" just are not practical for my family, alternatively if there is a set of 19" for sale within 200mi of colorado springs and for no more than $1000 for the set (rims and tires) I would be willing to drive to pick them up. For trading I would be willing to meet at a discount tire shop to have them swap them. I will post more pics tomorrow.