Quote:
Originally Posted by troek
this has greatly diverged from the topic, but im enjoying learning about this. what makes taller tires have higher load ratings? IE a 205/55r16 vs a 205/65r16.
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From what I understand is the lowest weight at which one of the following conditions occurs:
1 - 70% static side wall deformation occurs, where 100% sidewall deformation is the difference in the sidewall height at maximum pressure & 0psi with a specific load on the tyre (100kg think).
2 - the tyre overheats at the speed rating & max tyre pressure
So low speed rating tall tyres will tend to be able to support more load as they'll be overheating at max PSI before they run out of tyre deformation. Lower profile sports tyres will tend run out of deformation first.