my RPM's at 60 MPH
 

So got that tach in the truck today and went down the road.. Seems I a seeing 3000 RPM at 60 MPH. I am running 255-60-15 rear tires (almost new). The speedo may be a tad off so will verify with the GPS tomorrow because it started raining.

I also need to verify the rear end ratio. I thought I had 3:73 gears, at least that is what we figured out when we measured a full rotation.

What do you all think.... anybody figure out my rear end ratio by RPM and Tire Size vs speed. If the speedo is off it is by only a couple MPH...

Re: my RPM's at 60 MPH
 

I have 33" tires with 3.73's, TH400, and turn 2600ish at 60MPH. So I'd say you have a 3.73.

Re: my RPM's at 60 MPH
 

wondering what would be a nice fat tire on the rear to bring that rpm down some when driving that would give a nice fat rod look on the rear...

Re: my RPM's at 60 MPH
 

You could try 285-70, they are about 31" tall. I don't think BFG makes them anymore though.
http://i1260.photobucket.com/albums/...1/IMG_0557.jpg

Re: my RPM's at 60 MPH
 

You will have to go taller with the tire, OD trans, or Gear vendors overdrive. It is much cheaper to just change gears.

Re: my RPM's at 60 MPH
 

sideways, thats the tire look I want for the rear

Re: my RPM's at 60 MPH
 

Coker tire has them in the silverline 285 70 15
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Re: my RPM's at 60 MPH
 

Another option is Michelin LTX ms, they have a 30-9.50 and would go on a 8" rim nicely.:)