Well I had to upgrade my tires due to blow out on my single axle trailer. What came with the 518c was Carlile ST215/75/r14. I went Goodyear Endurance ST215/75R14
I hope they work better.
Tire Max Load per Tire1 Max Speed Diameter Max Pressure Maximum Safe Rig Weight for Single Axle1 Maximum Safe Rig Weight for Tandem Axle1 Carlisle Radial Trail RH 215/75R14 1870lbs 87MPH 26.8" 50psi 2992lbs 5984lbs Goodyear Endurance ST215/75R14 2200lbs 87MPH 27" 65psi 3520lbs 7040l