- Joined
- Jul 18, 2020
- Messages
- 217
Regarding the fuel economy drop, I lost about 12% going from fairly new Pirelli P Zero A/S to the X-Climate 2's. I chart every tank and have some long highway trips on these, so I'm pretty confident the drop is real. And this is going from a lower-profile 19" to a taller 18" (same overal diameter). Everything else about the tires is great, though, particularly the noise levels on concrete and wet handling. the UTOG wet testing is horribly outdated, and there are multiple independent reviews that all say the same thing: wet handling and braking is excellent, both in warm and cold weather. The only real downside on these tires in the high Crr.
I do question though how some of the independent tests have such varying results in Crr testing. I have to think it may be size-dependent, and I know from testing bike tires that an identical tire in different sizes can sometimes produce different results (though frankly, not this large of a discrepancy). All I can say for sure is that the 235/40 18's have pretty high Crr.
I haven't tested these out in snow or ice, as I have Wintrac Pros on another vehicle, but I look forward to checking them out.
I do question though how some of the independent tests have such varying results in Crr testing. I have to think it may be size-dependent, and I know from testing bike tires that an identical tire in different sizes can sometimes produce different results (though frankly, not this large of a discrepancy). All I can say for sure is that the 235/40 18's have pretty high Crr.
I haven't tested these out in snow or ice, as I have Wintrac Pros on another vehicle, but I look forward to checking them out.