Tire sizes:
The R is for radial... it used to matter back in the days of bias plies.
205/45R16Z on my wagon..
205 = Section width (205mm from sidewall to sidewall)
45 = Aspect ratio (45% of 205mm = sidewall height, not actual height)
R = Radial
16 = Wheel diameter
Z = Speed rating
So you see.. a 225/45R16 is going to be larger in diameter than the tires I have. This is also why I think 205/35 tires are redamndiculous for street driving. Sure, a Ferrari might come with 35 aspect ratio tires, but they're also much wider.
Wheel sizes:
4x100 et35
4 = # of lugs
100 = diameter of circle that holes are on (center of the holes on a 4x100 pattern wheel are 100mm from each other)
et35 = offset, aka backspacing (et 35 means that the backside of the wheel is 35mm -out- from the centerline of the rm. et-35 would mean the backside of the wheel is 35mm -in- from the centerline of the rim)
...
Did someone say the "g" word? :roll:
The R is for radial... it used to matter back in the days of bias plies.
205/45R16Z on my wagon..
205 = Section width (205mm from sidewall to sidewall)
45 = Aspect ratio (45% of 205mm = sidewall height, not actual height)
R = Radial
16 = Wheel diameter
Z = Speed rating
So you see.. a 225/45R16 is going to be larger in diameter than the tires I have. This is also why I think 205/35 tires are redamndiculous for street driving. Sure, a Ferrari might come with 35 aspect ratio tires, but they're also much wider.
Wheel sizes:
4x100 et35
4 = # of lugs
100 = diameter of circle that holes are on (center of the holes on a 4x100 pattern wheel are 100mm from each other)
et35 = offset, aka backspacing (et 35 means that the backside of the wheel is 35mm -out- from the centerline of the rm. et-35 would mean the backside of the wheel is 35mm -in- from the centerline of the rim)
...
Did someone say the "g" word? :roll: