Dumb question of the day..What is the tread depth on brand new touring tires? Running the original Dunlop 407s on my Street Glide with about 10000 miles on them. Bought a little tread depth gauge to see what I had left. Read about 4/32 then realized I had nothing to compare it to.

 

I measured mine with about 2500 miles and got .230 on the rear and .150 on the front.

So a fairly educated guess for new would be about .25 or 8/32 on the rear and .18 or 6/32 on the front.

 

Assuming that you are running a 180/65 on the rear your thread depth is 10/32.

 

Check on Dunlop's website, here.