Replacing my 90 steering wheel

Hi Guys,

I want to replace my steering wheel on my def 90 2002 CSW with a Momo steering wheel. They are asking me if the column is 19mm, 17.5mm or 15mm. Any ideas??

Forgot to mention I am not picking up my defender till the weekend. I had a 1999 one up to a year ago but got rid of it cos of the low emmissions zone in London from Oct 2010. I will be glad to be back in the "Team"!

Pete

I can't remember off the top of my head. I have one fitted to my 1999 110 and also have a different boss from where I had it fitted to my previous landy (1997 110). I think the shaft is smaller on my td5 if that helps.