Seems unlikely, but there are only 2 ways I can think of that being possible. (Aside from altering the laws of physics)

1) Your 17's were chronically under inflated
2) Your 20's are aftermarket car rims, which are super light and not meant for the load of a 3 ton pickup.

 

.....deleted

 

Oh sorry I must be mistaken then.
Both sets of wheels were Dodge oem

 

07-26-2011 11:17 PMHoffmanmh
hello Ram people. ok i just traded my 2009 slt for a 2011 Laramie, both witha 5.7 hemi . the 09 ran great and power full. the 2011 i put a k@n air filter in and a flow master 40 series muffler. so far i feel this truck is sluggish and not as powerful as my 09. is it that its just not broken in yet??? also dose any one know anything about those gforce chips u c all over the internet for 60 bucks and supposed to provide 60 horsse power and 7mpg