Going to 285/75/17s

I’m wondering how much my odometer and speedometer will be off by once I increase the tire size from stock or how I can figure it out.

 

Find the stock tire size. Brand and everything. Then Google what thr actual size of that is. (These sizes are all a little off).

Next find the exact tire youre going to buy and then do the same.

Now find thr percentage difference. And it should be the same but I would check tbe percentage difference on the circumference too.

I think that should do it if you want to be super accurate.

 

So, I saw this on the forums here the other day. I think this will help you make a determination.

 

Looks like a difference of about 7%


Also, keep in mind that the speedometer isn't perfectly accurate with the stock tires. Mine is almost perfect with 285/70/17's when compared to GPS.

 

285-70-17 puts the speedometer spot on.

 

Our 275's put the speedo right on with the radar units on the side of the road, but I don't take alot of faith in those radar deals on the side of the road. Maybe they are accurate...don't really know!

 

If I went to this size. I'd run the firestone xt, it's d rated so not as firm as e. And it's 54lbs. Kinda expensive though.

 

that's all I can say. You will pay more all around.

 

Yeah i got the cooper discovery strongholds and i think they are at like 55lb each and are e rated

 

Post some pictures!!!

 

I dont have them on yet but will this weekend

 

It is quite funny that you mentioned this. When I used a tire size comparison tool it showed my speed would be off. I drove past one of those radar signs showing your current speed, and it was dead on.

 

With what sized tires?

 

285/70R17's.