Stryker SR A10 CB antenna?

I saw a picture of your Wilson. I'd feel pretty comfortable with the washer and the Wilson. The Sirio has me a little concerned. Not as big a base and a lot heavier. I don't know how much actual difference there is in performance between the Wilson and the Sirio. I think I'd sacrifice a little to feel better about the mount.

I guess there's still enough threads coming through the roof for a good connection. Is the antenna base what holds everything together?

 

I had to buy a few extra pieces to hold everything together but everything screws onto the mount and the antenna screws on after everything else is put together.
If I was using the Sirio, I would try to use as much of the factory Hardware as possible to make sure that when it's all screwed together it's nice and watertight. The only original part I used from the Wilson was the rubber gasket.

 

Thanks for the picture.

 

Putting a big washer or plate to reinforce the roof from the bottom is a good idea. There's some mighty thin metal being used on many vehicles nowadays. The amount of metal flex from the wind load on a tall stinger with a small base can be amazing, especially at wind speeds of 75 mph and more.

With mag mounts, since they are designed to be pretty big at the base in order to assure a good magnet hold, they seem to handle the wind loads well. I use magnet-mounted Wilsons up to 62 inches in length on my personal vehicles. They can still flex the light metal, but with the relatively large base they seem to handle the load well.

 

My “favorite” roof backing plate — seen years ago — was a rotary saw blade.

 

I like that idea

 

Wide kerf blades can cause damage to the sheet metal.

 

I know, but it sure would ground well

 

Test the saw blade on a piece of aluminum foil first.

That will show any potential damage to the roof, since the foil is about as tough.