Actually, i am not totally sure. A friend of mine races go-karts and had bought this wheel and gave it to me as he never used it. I looked it up and it has the same exact dimensions as the sparco 310 steering wheel. The ONLY diff was that there were 3 holes instead of the 6 holes that are commonplace for all the sparco/momo wheels. So, i just drilled a new set of 6 holes, inset them so the screws would sit flush and put the emblem on over the 3 unused holes in the middle. I bought a quick release hub adapter and installed it all.
...Sparco also makes go-kart steering wheels (not sure if you knew that) and the wheel is sweet because it has "sparco" stitched across the top of the wheel in silver color so u can see it when looking in from the outside.