My incomming Kubota L5040 has 9.5-16 tires. The Rimguard website shows that it would add about 125 pounds per tire if filled with Rimguard. Thats considerable. 250 pounds total way out front would certainly keep my front end solid on the ground even with a heavy mower on the back. What is the bad side of filling the small front tires? A rougher ride I would guess. Anything else??