Understanding tyre’s parameters
03-17-2018, 02:03 AM
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Understanding tyre’s parameters
Wheels have easy-to-read labels that include letters and numbers grouped to fit the width, diameter and profile. A code may, for example, have the 6JX15 ET40 4X108 format.
Let’s find out what it means:
The inner width of the rim - is measured between the rim edges and it is expressed in cm. Considering the known factor as the rim's tolerances, it is not wrong to mount a slightly larger tire, about 0.787inch in height.
Total diameter - measured in inches from one side of the outside surface, crossing the center of the rim. The diameter of a rim is chosen according to the dimensions provided in the bead as well as the preferences of each driver. The diameter is always inscribed on the rims and influences the weight, stability, startup, etc.
Profile of the rim
The letters attached to the figure are showing the inside width of the rim show what kind of profile the rim is, on which surface the tire is located. Most of the cars have "J", a profile of the common and universal rim. 4 × 4 cars often have "JJ" rims, while other older cars may have, for example, a "K" profile.
EH2 (Extended Hump) - a type of rims that reduce the risk of tire detonation at the time of pressure loss.
FP - rim protection.
FR - Rim protection rib
FSL - Rim protection
RPB - Wheel rim protection
Let’s find out what it means:
The inner width of the rim - is measured between the rim edges and it is expressed in cm. Considering the known factor as the rim's tolerances, it is not wrong to mount a slightly larger tire, about 0.787inch in height.
Total diameter - measured in inches from one side of the outside surface, crossing the center of the rim. The diameter of a rim is chosen according to the dimensions provided in the bead as well as the preferences of each driver. The diameter is always inscribed on the rims and influences the weight, stability, startup, etc.
Profile of the rim
The letters attached to the figure are showing the inside width of the rim show what kind of profile the rim is, on which surface the tire is located. Most of the cars have "J", a profile of the common and universal rim. 4 × 4 cars often have "JJ" rims, while other older cars may have, for example, a "K" profile.
EH2 (Extended Hump) - a type of rims that reduce the risk of tire detonation at the time of pressure loss.
FP - rim protection.
FR - Rim protection rib
FSL - Rim protection
RPB - Wheel rim protection
04-12-2018, 12:18 PM
#2
AudiWorld Member
Yeah, not sure how things are done in Europe (an assumption based on your spelling of tire}......
You start off the tread by mentioning tire parameters and then once into the post you start with wheel specs.
In your example of 6J x 15 the with is in inches, not cm's as you stated. 6 to be exact.
ET40 refers to the offset of the wheel. Basically the distance from the flange to the center of the wheel.
Not sure what or where the letter designations came from.
You start off the tread by mentioning tire parameters and then once into the post you start with wheel specs.
In your example of 6J x 15 the with is in inches, not cm's as you stated. 6 to be exact.
ET40 refers to the offset of the wheel. Basically the distance from the flange to the center of the wheel.
Not sure what or where the letter designations came from.
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