bigger tires/big problem

[turbinesurgun]

i recently put 305 70 17 maxxis mudders on my 03 2500 4X4 and went to the dodge dealer to get it calibrated dealer said they could not go lower than 400 revs now the ABS light flashes every second or two and won't go off. what do i do is there something the dealer can do or do i just pull the bulb. ps i have already put over 10000 miles on them and it just started flashing at the dealer please help its really aggravating

 

[NDanecker]

Originally posted by turbinesurgun

dealer said they could not go lower than 400 revs

This is true. However, a 400 rev/mile tire is something like a 50" diameter tire. Your 305 tire should be something like a 33" tire.



I'd go back to the mfg website and checkout what they have listed for revs/mile under load --- usually at some specific speed.



EDIT: A 305-70-17 tire is theoretically 33. 8" diameter. Under no load it will rotate approx. 596 revs/mile. BUT these are calculated numbers. The manufacturer will have true revs/mile under load at a specific pressure. Good Luck!

 

[turbinesurgun]

thanks i will try that

 

[lawdog]

You can also go here for tire size difference... ... .



Tire Calculator

 

[turbinesurgun]

thanks

thanks i will take the truck back and tell them to set it at 596 revs per mile

 

[Yo Hoot]

My 35" tires call for 600 revs

 

[klenger]

This Excel worksheet might help too.



http://www.klenger.net/dodge/general-reference/gear-speed-calculator.xls