2001 ford ranger 3.0 v-6. going from 215\65r 15 up to 255\70r 16. The 15's are on the ranger and the 16's are off a 1996 ford explorer going on the ranger.How would changing tire sizes affect speed and mileage on my truck?your size proportions are not correct; never plus more than 1 size
current size - 215 - 65 - 15
next size - 225 - 60 - 15
Nothing else will work correctly and you will not have proper calibration on the speedometer
PS - these sizes already sound too big; refer to the owners manual for correct tire size; from that point you may plus 1 size up. bigger is not always better; handling, fuel economy and overall performance will seriously suffer.How would changing tire sizes affect speed and mileage on my truck?Bubba
the truth is going that size of tire will actually increase your fuel mileage because at 70 mph with your old tire your engine would be turning about 2100 rpm and with the taller tires at 70 mph you will only be turning about 1900 rpm. slower engine speed better fuel.
Also in town it will effect it differently. You will have slower acceleration due the the bigger tire so you will get less fuel mileage in town. is it easier to swing a baseball bat or a 20' pole. Same thing when you go to bigger tires.
So what is your daily driving like? in town I wouldn't go bigger, highway you will actually save money.
Your speedometer will be off but usually only by 5-10 mph. cheapest thing to do is get a buddy with factory sized tires to drive beside you down the highway at 60 and see what your speedometer shows. People think it is difficult to drive with an uncalibrated speedo but it just takes a little thinking.
Now beware because with taller tires your center of gravity will be higher and your truck will have more roll in a turn so slow down until you get the feel of the taller tires.How would changing tire sizes affect speed and mileage on my truck?you'd totally change the truck, the weight will affect performance, and your odometer and speedometer would no longer be accurateHow would changing tire sizes affect speed and mileage on my truck?well Logically a Larger tire size would consume more gas because it's revolutions are longer
