Andy October 30, 2012 at 1:47 pm - Reply I think the biggest issue with airless tires is that they seem to lack any adjustability, and have huge rolling resistance. With pneumatic tubes, I can put the pressure where I want, and just ride. A flat might take 10 minutes to fix, and costs me about 25 cents to patch (I bought a bulk patch kit of 100 that will hopefully last a long time). But with foam or other methods, you have a set pressure forever, and it has less efficiency compared to air tubes. I welcome the attempts, but I think there’s a reason why we still use tubes even after so many years!