Just got truck lifted and 37.13.50 18 inch toyo mud terrains put on, 4.88 gears on it, i got sct tuner that the lift shop put on, i checked with gps seems really acurate, so i got bored and was looking on settings and they have gears set right and the tires are set at 585 revs per mile, everything i find on here shows thats too much...but speedo is right, i have not checked the actual vehicle mileage to measure if thats correct but i would have to assume its correct if speedo is right? Am i worrying about something i shouldnt be and just leave it alone?

 

Anyone?

 

Here, let me google that for you.

*sigh*

 

I would have thought it should have been bore along the 560 range. Flip on a portable gps, and compare that to your speedo. Best speed checker out there...... unless you got a buddy with flashing red lights on his "other car".

 

ok ill have to try it, i mean the shop that did all the installs put the settings in so i assume they are right, i downloaded ap for my phone and its accurate with that but i will put my gps in and compare

 

Or, you could even go here: Toyo MT tires...you WILL have to make one more click all by yourself to find what you need

Or, you could even do this: Call Toyo!

Keep in mind that both of this options will require a teensy amount of effort on your part.

 

i did the gps and its acurate so im not going to mess with it, not to start anything but i looked on website i dont see anything that would help me...calling yes i could i do but as many people have the 37's on here i thought maybe i could get quick answer...my bad

 

The real "bad" here is that you can't, probably more accurately...won't, take the tiny amount of time it takes to look this up yourself.

Honestly, the answer to your question was literally ONE click away with the first link I provided to the Toyo site. Since you didn't take the time to check it out, I'm NOT going to spell it out for you. Gave you all the hints you're getting.

 

Actually Heat, Dewser was wrong in his last comment. The info you need is actually TWO clicks away from the link he provided. Click the link, click on sizes and specs, then click the "see complete sizes and specs" blue letters that are there. I have spent enough time on tire makers websites over the last few years to look for these links, and I'm guessing Dewser has too. For the record they list 560 as the # you are looking for also.

That said, if they are listing 585 as the #, and it is accurate, then it makes me wonder if they have input the correct gear size into the SCT tuner, or if 4.88 was an option in there. They may have either not adjusted for the actual gears you have, or compensated for the largest selection that was available in the device. Next time you plug in the device, have a look at the gear selection they have made for you. I'm a little curious.

 

Oops! 'My bad'.

 

its set for the 4.88 gears i checked...

 

You guys think i should try what toyos website says the revs per mile just to see where speedo would be then or just leave it alone?

 

I would just adjust the revs per mile as closely as possible in the SCT. Use the figure from the Toyo website I posted for you. Remember to account for about a 3% decrease for squish factor. See what happens.

It ain't like it's permanent one way or the other. You can tweak it until it's right.

 

the weird thing is according to three different devices, the speedo is within 1 mile per hour correct if not 100% correct