front tires worn edges very quickly on 1997 Nissan Quest

bought the van used, had new tires. front tires show alot of wear on outside edges. rear tires fine. van begins a shimmy at about 60mph. boyfriend says its the weights on the wheels ...

Asked by for the 1997 Nissan Quest
might want to have frontend elignment checked out recently had same problem had front end re eligned made a big differance 35to$45
thank you