visually,
class 2 is dinky looking, with a 1-1/4 inch receiver tube. max weight 3500
class 3 is standard, 2 inch receiver tube. max wt 5000
class 4 is a little bigger, 2 inch tube, max 8-10. doesn't look much different.
class 5 is massive, 2-1/2 inch tube, max 12-15

if you're setting up for heavy tow, be sure and match the ball and bar to the hitch. some *****/bars are lightweight, some heavy.

really good site
http://www.trailerhitches.com/info/t...rticle.cfm#HSG

 

my *****/bar are kind of heavy.

 

Braggart.

 

thnx.
that page put all of the info that i have been tracking in one site.
helped out a lot.

John

 

you know what they say.
They get heavy from lack of use!!