The more slack in your chain, the easier it will be to untangle it. Be careful not to create more tangles or twists in your chain. [3] X Research source Note that if the chain is twisted against the axis it moves along and the plates get bent, they cannot be straightened.
Make sure you are on a flat surface. Position the bike so the handle bars are perpendicular to the body of the bike. If you’re worried about scratching your bike, place a towel underneath it. [4] X Research source
Before loosening the skewer, you may need to pull or push a pin that will enable you to turn it.
You may be able to simply unhook the brake cable, thus releasing the brake.
If you have a derailleur – a device attached to the rear portion of the body of the bike – you may have move it forward and pull the chain a little bit harder to get enough slack to remove it. [8] X Research source
Repeat shaking the chain as needed. After some shaking, you may be able to untangle the rest of the chain by twisting or turning it.
If you have a derailleur, you may need to compress it to get more slack.
Try to remove the tire from the body of the bicycle. If it comes off the bike, you haven’t secured it properly. Verify that you guided the skewer through the half circle portion of the bike’s wheel housing and through the wheel itself.
You may need to readjust your brakes after you’ve reattached your bike. Simply tighten or loosen your bakes until you’re comfortable with how they work. [15] X Research source
Make sure your chain is on the teeth of the sprockets. If you have a multiple speed bike, you may need to move through a couple speeds to see if it shifts properly. Test your brakes before you go too fast. Recheck the wheel skewer to make sure it stays tight.