Most all new 2020 cars and many SUV's come with H rated or higher tires.
CapriRacer said:
But Tire Rack has a problem. they can't pump enough water onto their test pads to really test hydroplaning resistance.
[citation needed]
Thanks for sharing this,Admittedly, this is anecdotal:
As some of you are aware. I used to work for a major tire manufacturer. Shortly after Tire Rack installed their wet pad, we got the results of one of their tests - and the results were different than ours. We asked some questions and our test folks concluded that Tire Rack's water film was thinner than ours. We told them of our findings and they said they couldn't pump more water, and they were satisfied with the conditions.
So is there a National (or International) that specifies how this test is to be performed... or do the various tire manufacturers and sellers (like CR and Tire Rack) have their own way of doing it.
Most inconsistent surface is here in the US. States have much more say over construction of interstates than similar roads in other developed countries where there is more centralization of political power. Even in the states, interstates vary as local politics is pushing local suppliers.Well, there are standardized tests, but one of the biggest problems is the road surface itself. Road surfaces are so different - particularly in the different parts of the world (and even within smallish areas - say the same county!) that it is extremely difficult to duplicate results.
Worse, the tread compounds will interact with the macrotexture of the road surface such that there can be reversals. That is, test on one surface and you get a rank order, but test on a different surface and get a different order.
As a result, most specifications for traction, reference a single location where ALL tests have to be performed. In the case of the UTQG traction rating test, that surface is in San Angelo, Texas. It is monitored using an SRTT (Standard Reference Test Tire) - a former Uniroyal design, now supplied by Michelin from certified materials.
SAE has a series of standardized tests, but, again, the results will vary according to road surface.
There is a mixed bag of tests that are performed - and what tests are run and how much credence is given depends on who is evaluating the results.
The good news is the truly great traction compounds will always rank high, and truly poor traction compounds will always rank low - it's that the order might be different depending on what test is run and where it is run.
Most inconsistent surface is here in the US. States have much more say over construction of interstates than similar roads in other developed countries where there is more centralization of political power. Even in the states, interstates vary as local politics is pushing local suppliers.
I59 through Alabama, from Birmingham to Chattanooga, TN is perfect example. Road surface changes as one goes through different counties.
In the case of the UTQG traction rating test, that surface is in San Angelo, Texas. It is monitored using an SRTT (Standard Reference Test Tire) - a former Uniroyal design, now supplied by Michelin from certified materials.
Was randomly checking TireRack and came across their Rating chart. Consumer Report's latest tire chart is Here. Consumer Report tested T-rated tires, so my first question is, can one extrapolate T-rated tire ratings to H-rated tires?