All of my previous punctures I've had over 25yrs+ of riding have been slow leaks. Not the one this morning. Fucking hell it did go bang! Turns out to be a piece of wood approx 12mm diameter FFS! Straight through the centre of the rear tyre on the FJ. Cheap 16" AV36/40/45 Azaro rears are a bit thin on the ground too. Loads of AV39SS fronts of course. Always loads of the ones you don't need. Bollocks. JB