[RayVoy]

Guarantee if you only buy one will be the wrong one.
Grab a tape with both metric and inches.
The distance across the nut, from flat to flat is the size.
Just count the mm lines on the tape.

 

[RayVoy]

I could be wrong; but I think mine is a 35mm.
I remember buying the wrong size and returning it, I just don't remember which one I bought first.
However, knowing there was 2 possible sizes, I tried it in the parking lot. I was able to quickly return it for the right size.

 

[RayVoy]

I could be wrong; but I think mine is a 35mm.
I remember buying the wrong size and returning it, I just don't remember which one I bought first.
However, knowing there was 2 possible sizes, I tried it in the parking lot. I was able to quickly return it for the right size.

I just checked mine, it is a 36mm