As previously stated it is 1 1/8"

 

its still metric. 1 1/8" will work. but i dont have a socket in mm that size...

 

Metric? I though Polaris was built in the USA.

 

pretty much everything is metric on it. when i removed my fuel tank it was 10mm bolts. the lug nuts are metric. i had to go buy a socket for my alum rim lugnuts. i tryed a 1 1/8" on mine hub. there was a bit of movement. but i cant say what size it is in metric. since i dont have that size in metric. but im shure its like a 26 or 27mm.