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41x14.50x18 tires

943 views 1 reply 2 participants last post by  PGreenSVT 
#1 ·
I found a great by on some Swamper Irok Radials with 18 inch rims. Tires are 41x14.50x18 I am going from the 38's I just bought on 16.5 rims. I am hoping this change will help my freeway RPMs. I am running the 4.88 gears. By my calculations i will drop 200rpm at 65. I am currently runing 2000 RPM at 65. The swapers I have are true @ 38.1 and the new swampers I want are true @ 40.8 Am I in the ball park on my calculations and am I doing the right thing changing from the 38's to 41's. Little advice please before I buy...My buddy will buy my 38's for a couple of hundred bucks less than what i paid new a month ago. Advice needed
 
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