I know the E Load Range has the highest load capacity and therefore the thickest sidewall to prevent against punctures.
However when comparing the C Load Range to the P Metric Standard Load, the P Metric actually has a higher load rating than the C Load Range tires.
Do this mean that the P Metric tires actually have a stronger sidewall than the C Load Range tires. The exact opposite of what I thought.
For example take a look at the Bridgestone Dueler A/T Revo Specs
http://www.tirerack.com/tires/Spec.jsp? ... R6ATREVOWL
P-Metric Standard Load
245/75 SR16 109S SL
Max Load: 2271 lbs
C Load Range
245/75 SR16 108/104S C
Max Load: 2205 lbs
E Load Range
245/75 RR16 120/116R E
Max Load: 3042 lbs
Seems as if the C Load Range tires are not really that great. According to the specs it seems almost as if they are actually thinner than the P-metric.