GREENVILLE, S.C. (Dec. 4)—The Segway Human Transporter self-balancing, electric-powered personal transportation device unveiled this week depends on newly developed Michelin "Balance" tires for its traction, ride and mobility. Michelin North America Inc. developed the Balance tires and wheels in conjunction with Segway L.L.C., a Manchester, N.H.-based business founded by inventor and entrepreneur Dean Kamen. The two-wheeled Segway HT is a gyroscope-stabilized, battery-powered scooter capable of speeds up to 12 mph and a single-charge operating range of 15 miles. Because the Segway HT is designed to operate over a variety of indoor and outdoor surfaces, Michelin said it compounded a tire that is non-marking for interior and exhibits long tread life for exterior use. The distinctive tread allows tires to turn either forward or backward with precision handling, supporting the in-place turning capability of the device, Michelin said.