What size are the fork tubes on a 07 custom sporty?

 

They are 39mm

 

Thanks cHarley. The reason i asked is that i bought the wallyworld light kit that Joe Garcia mentioned and i want to mount them to some kind of clamps that go on the fork tubes. i need something that i can clamp around the tubes that has a way to bolt on the lights. Any ideas?

 

Lots of ideas here.
https://www.hdforums.com/forum/sport...tructions.html

 

I think i found the answer here,,,,,,,,,https://www.beartoothonline.com/bthd...5/Default.aspx. These should do the trick. Thanks all