RX-1 driveshaft diameter?

[Wheel House Motorsports]

I was just wondering what the diameter of driveshaft the RX-1 mountains use as i need to swap drivers onto it and need to know which size I need.

 

[TRIPLESWILLNEVERDIE!]

1and 1/16"

 

[Wheel House Motorsports]

thanks man! very helpful. TO bad bad i just realized i cant use the driveshaft i planned! ones of 15 wide tunnels dont fit the 16 wide tunnels so well!