'Inflate your tyres the motor sport way ' I was offered this Free by STS Tyre Pros in Norwich, so had it done. Its mandatory in the Airline industry, been used in F1 since 1992 and was used in the moon buggy tyres. There are lots of claims on their leaflet but the main appeal to me is that pressure should be maintained for 3/4 times longer than air. You can check them out at STS Tyre Pros, they are Nationwide and its free , just call in. They will also check and top up on a regular basis, all for free. What do you think, any opinions? They can also supply a great range of Winter tyres, at reasonable cost, Matadors (Owned by Continental) 4 x 225/55/16's for £432.24 all in.