Whilst riding today the front tyre hit something , when I got to Minehead , I spun the front wheel to check and could see a nail flush with the tyre just off centre . I Checked the pressure before I left and it hadn't lost any pressure , whilst riding home it occasionally felt like the tyre was hitting something . When I got home I checked the tyre again , but no sign of the nail , or any sign of a hole , is it possible for a nail to be pushed into the tyre and that's what I felt whilst riding home .