Mine were loaded by the JD dealer when I bought the tractor, so apparently he didn't see an issue. I have trouble seeing the small amount of weight that fits in the fronts making any difference in steering. On the other hand, the small amount of weight probably doesn't make that much difference otherwise either.I've always heard loading front tires is generally not recommended. I checked my Kubota manual, and this is what Kubota had to say:
"Do not fill the front wheels with liquid to maintain steering control"
I would imagine that at higher ground speeds the front wheels could be harder to steer?