I was doing a usual check on my tyres and found a nail in the rear tyre, radius about 2mm and 13mm long... should i worry? whats the tread depth of the 180/55ZR17 BT012 Bridgestone? I did a search but nothing useful came up.
Thanks.

 

I reckon if the air isn't comming out when you take the nail out (smear some detergent over the hole to see if it bubbles) then you're lucky and can ride happy.

My 2c.