The NSX uses a lug bolt instead of a lug nut. The lug bolt used is a 17mm hex head. So the NSX wheel is designed around a 17mm socket. It’s easy to see why a 22mm socket is such a tight fit!So all NSX owners have this problem? Or Acura dealerships have a special socket that you can't buy?
Do typical tire shops have access to thin walled sockets? Considering the titanium lug nuts talked about in this thread too but I’m looking to switch out my wheels ASAP.SOCKETS: My ultimate NSX lug nut intention was a 19mm lug nut, but for those who prefer to use 22mm OEM lug nuts, one socket I really have enjoyed is the Koken thin walled impact socket. I purchased both 19 and 22mm. I'm posting in this thread since it's related and I haven't seen this socket mentioned. It's a bit tough to find but easily one of the smallest diameter off the shelf solutions. Same as lug nuts, finding dimensions on advertised "thin wall" sockets is sometimes difficult and many thin walled sockets are actually pretty big! Koken has a plastic sleeve on this particular socket to avoid wheel damage, but it is removable (and needs to be removed) to use the 22mm socket in NSX wheels.
I found 29.5mm outside diameter to be the largest I'd comfortably be willing to install lug nuts into the NSX wheels with.
Diameter of Koken 22mm with sleeve: 30.5mm <won't work>
Diameter of Koken 22mm (sleeve removed): 29mm <will work>
Diameter of Koken 19mm with sleeve: 27.2mm <will work, but feels risky>
Diameter of Koken 19mm (sleeve removed): 25.7 <comfortable amount of clearance!>
In typical Japanese fashion, here is Koken's detailed diagram with dimensions of their thin walled impact sockets. They are available individually (~$20-25 shipped). Not cheap but it's a decent solution for 22mm thin walled sockets without having to turn a larger socket down on a lathe for those with no easy access to that solution.
This 22mm socket + black 22mm OEM Accessory lug nuts was going to be my solution if I was unable to find a lug nut that I was happy with. I'm still happy to have the 22mm socket in the tool box and I'll be using the 19mm now for all sets of wheels.
Website links tend to come and go for this so I would rather not post one that is not going to work in a month.