winter tires
- Thread starter BMWCA
- Start date
That is not good and could affect your traction control system, what happens when you corner, is your light flashing? I did this once accidently with my roadster and it would not corner without flashing and retarding the throttle. The size tire they put on your car is 2.54 inches bigger in Circumference than your stock size.
Here are the demisions of the tire sizes listed by BMWCA:
205/55-16 sidewall- 4.4" Radius- 12.4" Diameter- 24.9" Circumference- 78.2" Revolutions- 811/mi Speedoemter- 60MPH Odometer- 10000mi N/A
205/60-16 sidewall- 4.8" Radius- 12.8" Diameter- 25.7" Circumference- 80.7" Revolutions- 785/mi Speedometer- 58MPH Odometer- 9686mi
Difference 3.2%
Circumference
The circumference of the tire.
Diameter
The diameter of the tire.
Difference
The percentage difference in size between the reference (first) tire and a subsequent tire.
Odometer
The reported odometer reading compared to the reference (first) tire. For example, if the reference tire is listed as 10000mi and a subsequent tire is listed as 9500mi, that means the subsequent tire will report 9500mi traveled when the vehicle actually traveled 10000mi.
Radius
The radius of the tire.
Revolutions
The number of times the tire rotates per mile or kilometer.
Sidewall
The sidewall height of the tire.
Specification
The tire specification as determined by the calculator.
Speedometer
The reported speedometer reading compared to the reference (first) tire. For example, if the reference tire is listed as 60MPH and a subsequent tire is listed as 55MPH, that means the subsequent tire will report 55MPH when the vehicle is actually traveling at 60MPH.
205/55-16 sidewall- 4.4" Radius- 12.4" Diameter- 24.9" Circumference- 78.2" Revolutions- 811/mi Speedoemter- 60MPH Odometer- 10000mi N/A
205/60-16 sidewall- 4.8" Radius- 12.8" Diameter- 25.7" Circumference- 80.7" Revolutions- 785/mi Speedometer- 58MPH Odometer- 9686mi
Difference 3.2%
Circumference
The circumference of the tire.
Diameter
The diameter of the tire.
Difference
The percentage difference in size between the reference (first) tire and a subsequent tire.
Odometer
The reported odometer reading compared to the reference (first) tire. For example, if the reference tire is listed as 10000mi and a subsequent tire is listed as 9500mi, that means the subsequent tire will report 9500mi traveled when the vehicle actually traveled 10000mi.
Radius
The radius of the tire.
Revolutions
The number of times the tire rotates per mile or kilometer.
Sidewall
The sidewall height of the tire.
Specification
The tire specification as determined by the calculator.
Speedometer
The reported speedometer reading compared to the reference (first) tire. For example, if the reference tire is listed as 60MPH and a subsequent tire is listed as 55MPH, that means the subsequent tire will report 55MPH when the vehicle is actually traveling at 60MPH.
Big Daddy, your correct, apparently the acceptable differece is 3% but these are 3.2%. I spoke with the manufacturer (Pirelli) and they do not support this and have contacted the retailer. They are replacing them with 55 in a couple of weeks. The retailer thinks that it's okay to have 60s but I'm not comfortable with them.
BTW, my traction control does not come on when cornering.
BTW, my traction control does not come on when cornering.
It is OK as far as tire to rim fit is concerned, but the diameter difference is too much and is causing your problem as Dan said.
The retailer does not know what he is talking about. The retailer should be aware of the negative impact on ABS, traction control, flat tire monitoring computer systems, and brake pad/rotor heating. Brake pads and rotors are designed for a specific tire diameter specification. This is another factor in the 3% maximum recommendation.
The retailer does not know what he is talking about. The retailer should be aware of the negative impact on ABS, traction control, flat tire monitoring computer systems, and brake pad/rotor heating. Brake pads and rotors are designed for a specific tire diameter specification. This is another factor in the 3% maximum recommendation.
I want to return the tires for a full refund and take my business elsewhere. If they refuse (which they have before) it sounds like there's enough info out there that would help if I take them to small claims court! Pirelli does not agree to what they did and I'm sure BMW will also have supporting data.
Thanks all!
Thanks all!