I had been plagued with inner tubes forming pinhole leaks from the unforgiving requirement to get the covering on the spokes right when installing tires. Eventually I circumvented the whole problem by getting mag wheels on ebay. I did not bother to compare their mass to that of spoke wheels but the claim is they are lighter by some insignificant amount which does not matter to me because I use my bike to commute and not to race. With no spokes going through the rim there is nothing to cause pinhole leaks in the inner tube and I have been free from these leaks for almost half a year. I will never go back to spoke wheels.