PR4GTs: Riding 95% back roads, 5% slab I got 11,200 kms (6,720 miles) on the rear and 17,000 kms (10,200 miles) on the front. I could have pushed the rear another 500-1000 kms or so, but I changed them early because I wanted fresh tires front and back for a trip. I run my front tires at 41 psi...