33x12.5x17 MPH difference
#1
2004 f150 SCrew 2wd
Thread Starter
Join Date: Sep 2010
Location: Texas
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
33x12.5x17 MPH difference
How far is my speedometer off after putting 33x12.5x17 tires on my truck. before i had the stok chrome 17" wheels. i can tell there is a difference, but the only real way to find out would cost me about $200, that would need to be paid to the County. not how i want to know. is there some sort of calculation to use?
#5
Senior Member
Join Date: Aug 2010
Location: Newton, Ks
Posts: 158
Likes: 0
Received 0 Likes
on
0 Posts
Figure the circumference of your stock tires, then the circumference of your new tires. After you get those two numbers take the circumference of the New tires/circumference of the stock tires. This number should be over 1.0 after that mulitply this number times your old cruising speed to find out what the new cruising speed is.
#6
Figure the circumference of your stock tires, then the circumference of your new tires. After you get those two numbers take the circumference of the New tires/circumference of the stock tires. This number should be over 1.0 after that mulitply this number times your old cruising speed to find out what the new cruising speed is.
You can also do diameter of new tires/diameter of old tires. It'll give you the same ratio and the diameter is a bit easier to find than the circumference.
Trending Topics
#9
Senior Member
Join Date: Jan 2011
Location: North Carolina
Posts: 167
Likes: 0
Received 0 Likes
on
0 Posts
How far is my speedometer off after putting 33x12.5x17 tires on my truck. before i had the stok chrome 17" wheels. i can tell there is a difference, but the only real way to find out would cost me about $200, that would need to be paid to the County. not how i want to know. is there some sort of calculation to use?