Well, I know what will happen when I go out on the bike tomorrow after saying this
....but I have done about 5000 miles on my bike now without a puncture. I have Marathon Plus tyres...so it seems as if they work! It's only a hybrid bike and I am not overly worried about the weight of the tyres...but this seems like a lot of good luck so far!!
What is the longest you have ever been without a puncture?

What is the longest you have ever been without a puncture?