I have a 2010 Giant Trance X2 with the stock Mavic 317 Disc rims and Kenda 26x2.1 tyres.

As in a previous post I get flats regularly - particularly at Manly Dam. I've been running highish pressure, around 40psi, and it's been better although after another flat today decided to pull the 'Stans No Tubes' kit off the shelf and give it a go.