All I have to say is 40's are bigger than you expect. I'm running 40" nitto's and they are heavy for sure.

 

How much heavier are the 40s than the 37

 

Not sure on the 37s but the 40s weigh 104lbs

 

90.39 lbs on the 37s according to jk forum search

 

Thanks man that one heavy tire but those 40s will look so sick it's hard to say no to them

 

I have 5 in my garage

 

The tires I have now weight around 90 but do you think that the jump up to 105 would be too much.

 

Mtr/k is 90
Grappler is 105

 

I might go with the 40s it's hard not to idk got to make decision soon getting em in the morning

 

If you have a 4" lift and a body bump and cut fenders I'd say go with 40s for looks. If your running 38s now why don't you stay at 38. I always thought 38 was a good middle ground from 37-40. They visibly look bigger than 37s but don't come with the headaches of running 40s