Shaft Length?

[skirk55]

I was looking at a Wilson 2000 Trucker antenna and when I went to order it they asked me what shaft length do I want? For what reason is this important? For a fender mount on my F250 what shaft length do I need? :?:

 

[skirk55]

I meant a F350 not a F250!

 

[psycho]

I was looking at a Wilson 2000 Trucker antenna and when I went to order it they asked me what shaft length do I want? For what reason is this important? For a fender mount on my F250 what shaft length do I need? :?:

You are better off with a Wilson magnet mount.