Boasting a compact and lightweight design the shimano m520 spd pedals have a sealed cartridge bearing spindle to keep out water and mud allowing for smooth action and complete durability with a pop up surrounding cage for added stability they also come supplied with cleats lm features shimano m520 spd pedals compact and lightweight design sealed cartridge bearing spindle to keep out water and mud produce a smooth action durable forged alloy body pop up surrounding cage for add