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Engine speed and tire size

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Hi guys I have a problem.there  is a nice Mack  I want to buy but I think it's gonna be to slow.the truck is 1993 cl series with a 425 cat 13 speed rtlo14713 b.it has 4.42 rears.how fast will this truck go with 11r22.5,295.22.5 low pros,or 11r24.5 tires .the speedo is not working right now and it has the 295 22.5 low pros on it now.any info would be helpful thanks

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Try that link, 11 r 24.5 tires should figure around 44 inch tall, 42 for lo 24.5s and 11 22.5.  dont recall tire height for lowpro 22.5s.  B designation means the OD is .75:1 IIRC. Just plug in your numbers and figure out where you want to be RPM wise.  I run tall 24.5 rubber with 4.42 rears and run 65 to 70 comfortably.

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