986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Driving to altitude

mikefocke · 10-11-2008, 11:09 AM

around 9AM after driving 3-4 miles at 40 MPH, I totaled a '99 Boxster on very good tread Pirelli summer UHP tires when I tried to brake hard in a straight line and had no traction at around 30MPH.

You can't tell me those tires had warmed up enough to grip the surface of the road (asphalt) effectively.

So be especially cautious if the temperature is rising, the road surface may be cooling those tires, not warming them.

10-11-2008, 11:09 AM	#6
mikefocke Registered User Join Date: Aug 2005 Location: Sanford NC Posts: 2,537	In the high 30s around 9AM after driving 3-4 miles at 40 MPH, I totaled a '99 Boxster on very good tread Pirelli summer UHP tires when I tried to brake hard in a straight line and had no traction at around 30MPH. You can't tell me those tires had warmed up enough to grip the surface of the road (asphalt) effectively. So be especially cautious if the temperature is rising, the road surface may be cooling those tires, not warming them.