How do you take off a bike chain without the tool?
If your chain has a master link, remove the link by twisting it off with a pair of needle nose pliers. Press the nubs through to the other side to fully remove the link. You may need to use a hammer or wrench to tap the link so that it pops out allowing the chain to separate.
The chain works fine but their is no master link. You need a chain tool to push the pin through the connecting link. Good value if you have a chain tool.
How often should I change my bike chain?
The 2,000-Mile Rule. To avoid this accelerated wear of your cassette and chainrings, a general rule of thumb is to replace your bike’s chain every 2,000 miles. Mind you, this is just a starting point. No two chains will wear at exactly the same rate because no two riders treat their chains the same. 4
If you have a standard chain with no master link: Seat the chain in the chain tool, with the pin of the chain tool aligned with a pin in the chain. Turn the handle of the chain tool until you push the pin out far enough that you can break the chain.
Bikes that typically do have chains with master links are BMX bikes and one- or three-speed town bikes with internal gears. You can also identify if your chain should have a master link by measuring the width of the gap between the link plates. If the width is 1/8 inch, your chain should have a master rivet.