Husabutt
I've used the both Michelin and Metzeler bibs, prefering the Michelin due to their longevity. Typically we install a set in March or April and use them all season. By Sept they are very soft, but in a mud race, this is very desirable. However our riding is typically quite slow compared to the pace that we rode in Moab or especially the desert. I understand that desert speeds create to much heat and the foam comes apart.
For us bush riders, bibs are a no brainer and are used for trail riding and racing. The bibs would last longer if I removed them after each ride. They compress inside the tire and shrink as time passes in the tire. After a days riding and a 4 hr drive home, the last thing I want to do is remove bibs.
Installation is diffucult at first, very diffucult or impossible if your tire changing skills aren't already polished. Once a technique is learned they are way easier than a regular tire to change. More specialized tools are required, but flat tires are not the best when you are a long way from the trucks and gas is a more desireable payload than irons, air and tubes.
Sorry for the long spiele, but there is lots to learn and advantages to the bib.
Fry
PS the 6 month lifespan is their "recommended shelf life". I wouldn't buy a bib that has been on the shelf for 2 years, but at the 6 mo span would be ok in my opinion.
