"they have poor hydroplane resistance."
Hydroplanning a mostly a function of tread compound softness and inflation pressure...........when it rains run 40+ cold you will pick up 5 mph in safe speed
For airplanes:The formula that is used to compute hydroplaning speed is: Minimum total hydroplaning speed (knots) equals 9 times the square root of tire inflation pressure (psi) or:V = 9 ÆP For the B-757 main wheels at 144 psi, the speed would be:9 Æ144 = 108 knots.====~~~125mphFor cars the same formula applies:30 psi = 49.3 kts= 55 mph40 psi = 57 kts = 66 mph44 psi = 59 ktsObviously the above is not perfect and can change by 3-5% depending on compounds and tread design........
Ever wonder why trucks don't hydroplane [going straight] at 60-70-80 mph..........check their tire pressure
"Goodyear-supplied data accumulated at this facility for the Bridgestone Potenza S-03, the Michelin Pilot Sport and the F1 GS-D3. Typically, this data is taken at 2mph (which establishes a 100% footprint "baseline"), 40 mph, 60 mph and sometimes higher speeds, depending on the tire or the testing required. In this case, the data was for 2, 40 and 60 mph. At 2mph, obviously, all three had 100% of the footprint area retained on a pass through the .080-in water. At 40 mph, They varied from 88% area retention for the Goodyear and the Bridgestone to 91% for the Michelin. At 60 mph, things changed. The Michelin dropped to 61% of the area retained. The Bridgestone was at 64% and the Goodyear was at 67%." ........from
http://www.zr1.net/F1G3D3.html
Who checks ther inflation pressure, easy to cheat and make your tires look better with a pound or two of added pressure.