i have a question about the weight of a crankbait.

the rod that i have can handle a lure 3/8oz-1oz.  what is the reason to throw lets say a 3/8oz compared to 3/4oz?  is it only weight for longer casts?  what is the main reason for different weights if the rod can handle either or?

if there was a thread for this already, please guide me there and i will read.  no reason to beat a dead horse!!!  

No doubt you can definitely huck a 3/4 ounce weight about a mile.  Do the cranks have the same diving depth?  This might have something to do with it.  I personally go for the 3/8 to 1/4 crankbaits, and then the 3/4 ounce lipless cranks.

the main reason i asked this question was because i deal with a lot of top water cranks.  the one i am going to buy shortly is the same crank but the 2" version is 3/8oz and the 2-1/2" version is 3/4oz.  i know there is a size difference but wasnt sure why one over the other.  they both dive 0-1ft

More size usually = more weight. O.K. Get your minds out of the gutter! I don't pay much attention to the weight but rather the diving depth and the size of the bait.

Really the only time I pay attention to weight is when im dealing with lipless cranks. Any other cranks I also go by depth.

Really the only time I pay attention to weight is when im dealing with lipless cranks. Any other cranks I also go by depth.

x2. I'm still such a newb at crankbaits but I do want to be able to hit several stages of the water column so diving depth is mostly what I focus on.