What's the infiniti q60 lug nut size?

The INFINITIQ60 is a bit of a bigger vehicle and as such it's lug nuts are going to have a head hex size of 21 mm. The thread size will be m12 X1.25. They will have a shoulder length of just 8mm. These nuts are a bit uncommon so if You're in need of some I would try calling Your auto parts store before You head down there or better yet just ordering online. A set for a single wheel is going to cost between $25 and $40. If You need a set for all four wheels You're looking at between $75 and $110.