Originally Posted By: SubLGT
Originally Posted By: ExMachina
Originally Posted By: krzyss
VR, HR - the R means radial, it is not any speed or load rating, just construction.
Nowadays it probably could be skipped for any car tire.
Krzys
VR means the tire was tested to 149 mph speed, and HR to 130 mph, and it does indicate how tough the tire is. Its a speed rating. Not load rating. Its how much margin it has structurally during heat build-up and stress.
Speed ratings on the sidewall are designated by a single letter, not by two. It is V, not VR. It is H, not HR. It is R, not RR. You are the only person on the planet who uses 2 letters to designate the speed rating.
Nope. From my own recollection this is a dated nomenclature, verified by Wikipedia:
"Prior to 1991, tire speed ratings were shown inside the tire size, before the "R" "construction type. The available codes were SR (112 mph, 180 km/h), HR (130 mph, 210 km/h), VR (in excess of 130 mph, 210 km/h)."
https://en.wikipedia.org/wiki/Tire_code
Originally Posted By: ExMachina
Originally Posted By: krzyss
VR, HR - the R means radial, it is not any speed or load rating, just construction.
Nowadays it probably could be skipped for any car tire.
Krzys
VR means the tire was tested to 149 mph speed, and HR to 130 mph, and it does indicate how tough the tire is. Its a speed rating. Not load rating. Its how much margin it has structurally during heat build-up and stress.
Speed ratings on the sidewall are designated by a single letter, not by two. It is V, not VR. It is H, not HR. It is R, not RR. You are the only person on the planet who uses 2 letters to designate the speed rating.
Nope. From my own recollection this is a dated nomenclature, verified by Wikipedia:
"Prior to 1991, tire speed ratings were shown inside the tire size, before the "R" "construction type. The available codes were SR (112 mph, 180 km/h), HR (130 mph, 210 km/h), VR (in excess of 130 mph, 210 km/h)."
https://en.wikipedia.org/wiki/Tire_code