Straight off the bat, the high initial cost of mousses makes many wince. At £200 for a set, it’s a high outlay if you compare directly to tubes. However they will last far longer than you imagine if you keep them lubed correctly and you don’t do too much road work. Contrary to popular belief they are not illegal for road use in the UK, but you should check in your own country. That said, bearing in mind you tend to fit a tubeless valve just to seat the rim so it looks identical from a conentional tubed tyre, the possibility of your average member of the constabulary spotting the difference or knowing anything about mousses is small.