Tire efficiency

[DeaneG]

The EU has a standardized method for measuring and reporting tire rolling resistance. Efficiency values are available online as part of the ordinary specs of the tire.
The US does not have a similar system. But California has something similar in the works. I'm looking forward to making use of this data in the future:

https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMDEsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMzAyMDIuNzA5MDUyMjEiLCJ1cmwiOiJodHRwczovL2VmaWxpbmcuZW5lcmd5LmNhLmdvdi9HZXREb2N1bWVudC5hc3B4P0RvY3VtZW50Q29udGVudElkPTgzMTM1JnRuPTI0ODYzOSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9zb3VyY2U9Z292ZGVsaXZlcnkifQ.mhxAIDurzy2w4D3cEIIOKPqzQBKSUN0UxsGIVKE37PQ/s/2956523058/br/153911828011-l

 

[TheNewAero_Alexander]

We had a scale from A to G and now it's changed to A to E. From 7 to 5 levels it seems but it is actually from 6 to 5, because in the old system the letter D was only the centerline which could not be achieved making it a bit misleading since a C and E tire could be almost the same.