I've recently bought some ex-demo Shimano Dura Ace Scandium wheels with Continental tubeless tires to go on my Tri bike and have a curious problem. I pump my tires up to 100 p.s.i. as standard and air seems to leak out of the front wheel at a much faster rate than from the rear wheel, until the pressure drops a little and then the rate of air escape is much reduced. I guess there's a small gap somewhere in the sealant in the front wheel, but how to fix it? If I take the wheel back to the LBS where it came from, they'll put some sealant gunk in it and give it back to me, that'll no doubt solve the problem, but will make it a horrid mess to change tyres in the future - which I really really don't want!!! Does anyone know how I can sort this wheel out without resorting to sealing gunk? I'm a bit wary of messing with tubless tires, as I've heard they are easy to damage. Brilliant wheels and tyres by the way. Would really recommend them.