Had an eventful ride yesterday, not one, not two, not three but four flat tyres. To start I'm riding a meandering track along the NSW side of the Murray, it's fresh but the sun is out, except for being chased/attacked by a dog I'm having a good day. Then the bike starts to feel a bit weird, so I stop check the back wheel and for all intents it's fine. So I put it down to the track being a bit greasy and continue on, nah something not right, then I realise it's my front that's going flat. Flip the bike upside down, pull the wheel and strip the tyre and tube off the rim, run my hand around the inside of the tyre and feel multiple thorns sticking through. Spent the next 15 minutes removing all the thorns, or so I thought. Fit a new tube, inflate and put the wheel back in the bike, all good to go, give the rear a squeeze, bugger it's now flat. So repeat what I done to the front and I'm on my way, had enough by this stage so with 15klms to get home off I went. Bugger me, I'm 100mtrs from home and the back goes flat again, totally lost interest by this point so I walk it home and put the bike away. You might be thinking but you said 4 flat tyres? So a couple of hours later I'm eating my dinner while enjoying a refreshing beverage and I hear a muffled bang accompanied by hissing air, I go to investigate only too find the front once again is flat. So my conclusion is the tyres are riddled with thorns and I'm probably best to just replace both tyres rather than risk repeated flats.