Your know what really grinds our gears? A worn chain. Take preventative action against premature drivetrain wear with this Lezyne Chain Gauge

Compatible with most 8/9/10/11/12-speed bike chains. this stainless steel Lezyne Bike Chain Gauge is a multi-function bike chain checker featuring an integrated chain hook and wear indicator as well as a handy valve core removal tool

And guess what, it even has a built-in bottle opener, ready for you to crack open a cold one!