The stock Metzeler Roadtec Z8 Interacts tires were good, but the rear was wearing square at 6000-mile service (a.k.a. oil change) time, so I opted for an early change. I was looking for something juicy in the corners that wouldn't box off if I needed to burn some straight miles. Jeff Hanrahan, the General Manager of mega dealer A&S Cycles, based in Roseville, California, recommended Michelin's dual-compound Pilot Road 2 ($148.99 front, $215.99 rear; www.michelinmotorcycle.com). I couldn't be happier. My most recent miles have been cold, rainy ones on mountain roads, where the Michelins inspire nothing but confidence. On dry, twisty pavement, the Road 2s are a glorious match for the GT's heft/agility ratio. And thanks to the more durable center compound, I can rack up thousands of miles without that nasty squaring that usually plagues endurance riders on lesser rubber.