Yes; I leave the weighted tires on all year, it's too much work to change them, twice-a-year. For some tractors I have two sets of tires, one light/wide for the summer mowing and the other very heavy & with chains for Winter Plowing. (10psi Summer, 20psi Winter).
My 416 tilling tractor has had the same weight and tiller on it for the last 8 years, all year (80# RimGuard in tubes, 50# outside Steel plus 30# inside Steel weights, = 160# per rear tire), no flat spots, holds pressure perfect (plus the fronts at 60# each) for a total of 440# added weight and the tiller stays attached all year also. All that extra weight makes tilling just perfect, nothing slows it down and I have not noticed any problems, I just hope I never do get stuck.