PARK TOOL CC-3.2 Chain Checker Heart Rate Monitor The socks use Q-Skin yarn

The socks use Q-Skin yarn created to feel very soft against the skin providing freshness

They're bigger

The steel tool bits are made with our Black Anti-Corrosion Technology for increased corrosion resistance

with a long sturdy handle and a large passthru hole that allows use without removing most quick-release skewer nuts

Always use a strap to secure the computer to the handlebar

PARK TOOL CC-3.2 Chain Checker Heart Rate Monitor The socks use Q-Skin yarnA worn bicycle chain can cause poor shifting and in time can even cause excessive wear to the derailleur and rear cogs, causing a much more expensive problem. That's why bike component manufacturers recommend chain replacement at regular wear intervals. The Park Tool CC 3. 2 is a go no go gauge designed to accurately indicate when a chain reaches 0. 5% and 0. 75% wear (or "stretch"), the points at which most chain manufacturers suggest replacement.