Bike Chain Checker Tool for All Bike Chains, Including Shimano, Sram, KMC, Campagnolo and More - Chain Wear Indicator for All Speed Chains and Ideal for Road, Mountain Bicycle Maintenance

Congratulations! Check your chain wear, brakes, tires, torque on all bolts, you name it.

Couldn’t agree more. Level 3, got this amazing chain tool ( KIEVODE Bike Chain Checker Tool... https://www.amazon.com/dp/B0C6GMDJWF ) and at 3000 miles, just 5 months, it already read a 1.0, and I also damaged the cassette so badly that when I changed the chain, I also had to change the cassette, since I wore our Gear 8 so badly.