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On either side of the rear tire, there is a nut at the back of the frame with a locking nut over top it. Loosen the locking nuts. then loosen the other nuts. pull the tire back until the chain is tight( I know this is bad, but I usually just hit the axle nut on either side with a hammer until the chain is tight. not recommended) . When the chain is as tight as you want it, tighten the screws and you're good to go. Don't pull the chain too tight though. Your rear brake will lock up. The rear break pedal should be tighter than it was before, but not so tight that you can't back the bike up. There are guides just behind the axle nut on either side that are marked. These will help you make sure that the rear wheel isn't misaligned. If you go past the arrows though, you need a new chain. You need a new chain often ( I've put 17,000 miles on my bike and I'm about to start on my 3rd chain).

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16y ago

What else can I help you with?