I check my tyres manually once a fortnight. It is, unfortunately, not often enough. Does anybody have have experience with (or use) tyre pressure monitors? BTW - I searched old posts on this one and SmarTire have withdrawn from the motorcycle market and 'Tyre Signal' colour-coded caps got a bad review. I was thinking about [URL]http://www.tyredog.zylux.com.au/td4000ax.html[/URL] which retail at about 0, but I'm wondering whether it will provide any real value to me. It may be better for track use (?) and end up just being excess weight for me to carry around everywhere (63g in all) until it stops working. Apart from wanting people's opinion on this idea, I've got 2 concerns about TyreDog in particular: 1) It might be designed for fair-weather riders (my only reason for thinking that is the display is a key ring, BUT it mustn't get wet!). I'm in the market for indestrucible systems only. 2) The manual says: "Precaution: For alve stem used on Motorcycle, please use lock-fixed type, not in rubber made." which is Japlish, but I haven't got a clue what for. Also, as the sensors are 10g each, I suppose they could affect the tyre balance... but seeing as how I can fail to notice a flat tyre, that probably won't be a concern for me!