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Originally Posted by Mica
Hi to all of you,
I am new in this forum and first of all I would like to say that it is a very good site for people who like BMW. 
I wanted to know
Does anyone know about a speed limitation on X5 if you fit All season tires?
If someone does know anything about that, I wanted to know if the limitation is set with the on board computer (I-drive) or otherwise.
Many thanks in advance |
Mica, all tires have a speed rating so it depends on the exact tire, but you can correlate the tire to its speed rating by the chart below. All of the information below was cut-and-paste directly from the tire rack.
Cheers,
Keith
M 81 mph130 km/h
N 87 mph140km/hTemporary Spare Tires
P 93 mph150 km/h
Q 99 mph160 km/hStudless & Studdable Winter
R 106 mph170 km/hH.D. Light Truck Tires
S 112 mph180 km/hFamily Sedans & Vans
T 118 mph190 km/hFamily Sedans & Vans
U 124 mph200 km/h
H 130 mph210 km/hSport Sedans & Coupes
V 149 mph240 km/hSport Sedans, Coupes
When Z-speed rated tires were first introduced, they were thought to reflect the highest tire speed rating that would ever be required, in excess of 240 km/h or 149 mph. While Z-speed rated tires are capable of speeds in excess of 149 mph, how far above 149 mph was not identified. That ultimately caused the automotive industry to add W- and Y-speed ratings to identify the tires that meet the needs of new vehicles that have extremely high top-speed capabilities.
W 168 mph270 km/hExotic Sports Cars
Y 186 mph300 km/hExotic Sports Cars