We had both tyres wearing on inside. It was suggested by the people that service the van that we may have a bent axle. After they had discussions with ALKO & JAYCO Alko decided to pay for triangulation measurements to see if the axle was bent. This showed that the axle wasn't bent but was not centred on the van correctly. The axle was removed the plates that are welded onto the axle were removed and repositioned, the complete axle was rotated 180degs. JAYCO paid for the work to be carried out (the van was out of warranty). The van seems to travel easier behind the car now