I just put on my new rims. I was wondering if I need to replace my speedo gear to accomodate for the rim change. I went from 14s to 16s. I will post pictures later.

 

depends on tire size. if your tires are smaller to acomodate the change, then no. but if they are the same general size (obviously not including the different diameter..) then your speedo will be off.


(# of drive gear teeth) x (axle ratio) x (tire revolutions per mile)
__________________________________________________ ___
1000


Just plug in the number of teeth on the drive gear inside the transmission (6,7,8) multiplied by the axle ratio (3.00, 3.50, etc) and multiplied by the tire revolutions per mile, then divide all that by 1000. The result, such as 19.27 is the approx. number of speedometer driven gear teethneeded for accurate speedometer readings. tire revolutions per mile can be found within manufacturers specifications for a given tire and size or roughly by the equation

63360
_____________
3.1415 x tire diameter in inches.

 

Hey BAwhere did you get 16' rims for a 6cyl

 

I bought 4.5 to 4.25 adapters for the mustang. Then I bought some fox body pony rims.

Adapters

I do have 1 pic off another forum of the car.

Mustang

 

I really don't think the tires are smaller.

I went from P195/75R14 to P205/60R16 and P245/50R16

 

They look good on it. I have been trying to figure out what to do with mine. It is 4 lug I plan on changing it but don't have the money right now. I tried mach 1 hubcaps but they wont fit rim isnt deep enough. I hate the hubcaps that came on it. So maybe you have just given me my answer.

 

Try this link:

http://www.discounttiredirect.com/di...foTireMath.jsp

I've found it quite helpful in the past.

 

When I did that is said I would read 65.3-65.4 with the new rims. That is compared to the old tires reading 65.

 

They are only about .15" taller, I don't think that will do anything...

 

Looks like you're in business as-is. (This, of course, assuming that the reading on your previous tires was accurate!)