yokohama 40s are also lightweight.Someone gave me a link to an amazing product but you had to take half the motor apart to install it.
I had 40s and steering was tight, I realized the Nitto 40s were 111bs a piece so I replaced them with 39.5 BFG;s and they weigh 21lbs less per tire. problem solved.
Another alternative is the milestar Patagonia tires in a 40, they get great reviews and weigh a lot less also.
No it has been a hectic last month we had a death in my family we are doing the install tomorrowDid you ever get it installed? Any difference from the instructions?