Speedometer and tires size

[Milwaukee]

I bought 99 Expedition eddie bauer AWD4.

Long story someone swap rims from factory I believe 265/70/17 to 255/70/16 so it pretty TINY tires that are pretty overload look like it flat when I am tow boat behind.

I notice that speedometer read higher like 4 mph off. I only want put little bigger tires maybe 1" to see 1-2 mph off. Would like little heavy duty tires that rated 50 psi so I can tow heavy trailer without feeling squirmy down road.

And I am concern about MPG so I would like find highway tires that doesn't affect mileage. I am average 15-16 in city with short trips. Long Highway with hills I got 18.73 mpg at 60 mph.


Thank
Sorry for my bad grammar.

 

[FordandPolaris]

You would be fine. I went from a 31" tire to a 33" and saw relatively little fuel economy decrease, and my currrent tires are substantially more heavy. My rims are 16" rims, and I used to have 265/75's on them before the 285's. Cooper A/T3's are supposed to be a decent tire. My buddy just got a set and he likes them. Otherwise the S/T Maxx's that I have are awesome as well, but a bit spendy and they are pretty stiff tires.

As for the speedo, if you want to correct it you can do 265/75/R16 size tires and it should be pretty close to correct. Mine is about 6 mph slow when doing highway speeds.

 

[toms89]

Both tire sizes were available on the 1999 expedition according to the tire dealers.

You can always go to a tire with a higher load rating if your concerned with them while towing. I personally never had issues towing my boat or car with stock 255/70-16's that came on mine. Do you know the tongue weight on the boat/ trailer? I believe it should between 10 to 15% of trailer weight loaded.

How do you know your fuel milage if the speedo is off ? Did you correct for it because if your speedo is off so is your odometer readings by the same percentage.

 

[FordandPolaris]

Tom has a good point. For every 100 miles I go my odometer only reads about 97 traveled if I remember the math right.

 

[Milwaukee]

You know highway's marker with mile? I track. It almost TIE at 20 miles later probability .5 higher.


The tires look FLAT when I loaded 1000 pound stuff in cargo. They only can hold 32 MAX AIR PSI. My friend who was behind me could see tire's sidewall flex on curve. I don't ever drive like *******. I drive like granny and gently. Only keep rpm under 2K.

I would like just skinny tires like 235/85/16 but it too TALL for me.

 

[FordandPolaris]

I would stay around the 265 range. Find a set of tires with a higher load range. Mine are load range E and they can air up to around 50psi. Talk to some tire shops to get an idea of what kind of tire you are looking for.

 

[Milwaukee]

I would stay around the 265 range. Find a set of tires with a higher load range. Mine are load range E and they can air up to around 50psi. Talk to some tire shops to get an idea of what kind of tire you are looking for.

What about 265/70/R16 they look .50" bigger than 255/70/16

 

[alaskanexpy]

hey dan, i'm running a 265/75 16 E on my expy. mine came with 255/70's stock so my speedo is off showing too slow by 5mph. (@70 i'm doing 75mph)

a 238/85 16 is the same height as a 265/75 16 FYI

 

[Milwaukee]

hey dan, i'm running a 265/75 16 E on my expy. mine came with 255/70's stock so my speedo is off showing too slow by 5mph. (@70 i'm doing 75mph)

a 238/85 16 is the same height as a 265/75 16 FYI

Hey you found me I was wonder if you can get rear view of expedition I want see how wide tires will be look like.


I am concern about mileage from light tires to heavy tires. Won't it affect or just little?

 

[alaskanexpy]

i dont think you will see much if any difference, i could very well be wrong but who knows?

heres a bad pic of my summer tires. keep in mind i run 8" wide wheels in the summer also which makes it just a tad wider then stock 7" wheels