After the ride I have a look inside the tire & heres what I found.
src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvVN7tgMkH_4Dfqk3SqYCo5PuRMzJG4N_FqkTxPrZme3z83_BklyqgW6L8-2PLxkFXquUj20ACyUOIyrmzVwFfgwSk67W3uCR3aT02QNSeKZrx2zRjn9qf8EINa_JZbopdy5X7e9PzsM8/s400/ayup+roadie+079.jpg" style="DISPLAY: block; MARGIN: 0px auto 10px; WIDTH: 400px; CURSOR: hand; HEIGHT: 178px; TEXT-ALIGN: center">These amazing structures created from liguid latex. The one on the left was about 5cm across.
I must remember to check the latex in my tires more often ;o)