I have just had a 2 year service on my Autotrail Comanche (Tag axle) and the service guy tells me that my front tyres have 5mm and 4mm tread left on the centre line. The 4mm was marked as "close" to the limit. The tyre pressures I normally run at is 60Psi. I have only done 11500 miles since new 2 years ago and didn't think I would wear them out so soon. Is this something others have experienced? The tyres are Michelin Agilis Campers. I know the van is a heavy beast and front wheel drive but I was expecting a greater mileage out of a set of tyres. Most of the threads on here are about changing tyres due to age or cracking, and I have not read anything about wearing them out. Oh and I don't do "wheelies" or screeching away at junctions. Has anybody experienced similar tyre wear?