This unique bicycle disc brake rotor has several innovations. The outer track of the Shimano RT99 is highly durable steel sandwiched over aluminum. The inner fins help cool things down, dissipating 50 degrees more heat than other rotors, meaning more power and modulation without melted pads. [$80; bike.shimano.com]
56 Perfect Things
Tech, Tools, Toys, & the Hottest New Gear
Plus: The Deadly Thrill of BASE Jumping
ON NEWSSTANDS NOW
Merle Haggard's Life Advice
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.