Instead of guessing, Go to the specs for your tires and it will list the minimum dual spacing required for your tire. Measure from the centerline of one tire to the other. A little "tire bump" is rubbing and can cause a blowout. Firestone 225/75R16 LRE requires 13.6 inch spacing..
Another check is to look at the rim offset for your rims. 7 inch offset is 14 inch spacing with a tire mounted.
https://www.rvtiresafety.net/2016/12...-changing.html
FWIW-- Hysteresis- Lagging Flux forces generated by a moving magnetic field usually has minimal effect on dual spacing.. particularly at sub-sonic speeds.