Tires

[Geo]

Pat, you sent me off in a search to straighten out my confusion after your post on Z ratings.  I thought WTF that's not what I know.  So after finding some "old" info on the web that was the same as the old info in my head I found the latest:

L    75 mph    120 km/h    Off-Road & Light Truck Tires
M   81 mph   130 km/h   Temporary Spare Tires
N   87 mph   140km/h   
P   93 mph   150 km/h   
Q   99 mph   160 km/h   Studless & Studdable Winter Tires
R   106 mph   170 km/h   H.D. Light Truck Tires
S   112 mph   180 km/h   Family Sedans & Vans
T   118 mph   190 km/h   Family Sedans & Vans
U   124 mph   200 km/h   
H   130 mph   210 km/h   Sport Sedans & Coupes
V   149 mph   240 km/h   Sport Sedans, Coupes & Sports Cars
W   168 mph   270 km/h   Exotic Sports Cars
Y   186 mph   300 km/h   Exotic Sports Cars
(99Y)   in excess of 186 mph, 300 km/h
when the Y-speed rating indicated in a service description is enclosed in parentheses, such as 285/35ZR19 (99Y), the top speed of the tire has been tested in excess of 186 mph, 300 km/h

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=35&bPostID=post-id-87555290-bf13-4eed-8a0a-f2ecf721438d&

Now there is also a (xxW), when the W-speed rating indicated in a service description is enclosed in parentheses the top speed of the tire has been tested in excess of 168 mph, 270 km/h

http://en.wikipedia.org/wiki/Tire_code

Looks like I will need to keep my towing speed down.

Geo

[WOODY@DDLLC]

I think you can finger it out from this!  This info was given to me by MT engineer! Tire growth is linear at other speeds.

[jimmy six]

Longshot ...you may not want to here this. If your building a streamliner with an existing record you will need the appropiate tires for the existing record not what "your wife is going to drive". If it's under the 186 you probably OK but if it's a liner record at let's say 250 then that's the tire you must have on your car.........Good Luck

[jacksoni]

I have a set of the older Mickey Thompson 25x6-15's that are about 24.3" diameter. And at speed grew enough to rub body work with .5-.75" clearance. . With that experience in their minds I recall a number of years ago when Don Garlits showed with a liner to do big things, my son and his cousin wandered by and commented to the crew working on the car that the tires were going to rub. In no uncertain terms were told to beat it (in contrast to all other experiences on the salt we have had in 17 trips over 33 years). Did their hearts good when they came back after a pass and found the same crew members cutting body work out from around the tires.