| there is not a 2" difference in contact patch though. jegs is a good, quick reference for all the tire sizes in different brands. the 10.5 et street has a 8.4" contact patch
[ http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_47024_-1 ] the 11.5 et street has a 9.7" contact patch
[ http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_27284_-1 ]
just a little over 1" wider for the 11.5, but it does make a difference. what also makes a difference is the section width (bulge or sidewall to sidewall measurement). the 11.5's have 1/2" more of that as well, wich equals a little more wrinkle ;) like i said in my replies the other day though. the mickey's run a little big. so you really end up with about a 10" contact patch on that 11.5. and you definately want some type of bias ply skinney on the front, or its gonna be scary and dangerous up top. 
9.46@142 1.37 60ft
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no doubt, get the 11.5's............ - 
