Here's to all the people that have posted cautions about trying the airless tires and knuckle heads like myself ignore them and try airless tires anyway.
I bought some airless NuTeck tires. 700Cx35. Went on fairly easily. First rides, at slow speeds, around the neighborhood seemed good.
Commuting a couple of days on them has proven to me that they are not perfect for commuting.
Granted, I haven't had a flat and I like that piece of mind.
However, they do seem to have marked, increased rolling resistance over tube/tire combinations. Coasting downhill is about 4 mph slower than tube/tire speeds as well as more pedal effort - even on level ground.
At about 18 mph and faster the tires on my bike seem to be squirming, (like the tire doesn't want to track straight or in any direction in particular - all the time), this feels unsafe to me.
I think the tires would be great on level ground at slow speeds - like at a beach resort. "Down the shore" , in Philly lingo.
So, if you have warned people about airless tires not living up to their claims - I accept the fact that, "You told me so..."