I was thinking hat the fronts didn't have quite enough clearance behind the center wheel disc, but it does look like there's the better part of an inch between the outside of the axle mounting flange and the inside of the wheel rim, so a drill isn't out of the question.... I see a possible project in the making.
The front "bumper" would be the logical choice, but the front mount quick-hitch business for the snowblower effectively prevents that option: that's where IT hangs. (Hmmmm... maybe add weight to the quick-hitch frame?

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Oh, well. Time to get back to preparing for winter; garden's ready, leaves gone, grass cut, mower stored, boat put away, most motorcycles put up, snow tires mounted, vehicles inspected & serviced.... just a few projects left. Prob'ly get everything done about a week after the first snowstorm.