Cplager, thanks for the reply this is an interesting topic.

I just recently put some rhino dillo tire liners in my 1.5" slick mtb tires. When I read reviews about them many people complain about the weight, some also say they affect the feel/performance/rolling resistance (I suppose the latter argument might have some validity) so far though (after one commute) any perceived difference is minor if not entirely made up in my head. Well there is one big difference, I didn't have to patch a tube yesterday.