I'm thinking about buying a M3 or M4, but I have to use one of those Steering Wheel Spinner knobs to drive cars. I have noticed that the M Steering Wheel is really thick, and I'm not sure if my Spinner Knob can fit over it.....

Can someone please measure the Circumference (wrap a string or something around the thickness) of the wheel at the Top left part (to the right of the bulge) Also if you could measure it at the bottom left section.

And if you could measure the diameter of the overall wheel, that would also be good.

Thanks!