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]
The Brutal Charm of an NFL Hit Man
Plus: Jesse Ventura vs. the Navy Seals
ON NEWSSTANDS NOW
When to Say No to Your Doctor
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.