The geometry on the axles can shift, but I don't think that is a common problem. I would have them spin balanced before diving into anything else. Any tire shop can do it.
2015 Seaark 1872 MV CC Etec-90
Helix 12 CHIRP SI, HB 1199, MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
Bitter Gun Owner