Thats pretty light for 40's! How close do they measure to 40"?I just bought two sets - 37x13.50x17 and 40x13.50x17 for my Broncos. In the process of doing an axle swap so will get to try the 37s out first. The other Bronco with the 40s will be ready at the end of the year...
The 37 weighs 80 lbs
The 40 weighs 90 lbs
I weighed them on a digital bathroom scale.