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]
Gear of the Year
102 of the Best Tools, Toys & Tech
Plus: The Woman Who Bails Out the NFL's Bad Boys
ON NEWSSTANDS NOW
Joby Ogwyn: The Man Who Fell to Earth
Life Advice from John Cleese
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.