PancakesHD

I was replacing by back tire, it went well. Then I begun to put the wheel back on the frame but I can't see to get the chain on there correctly.
I can't explain that well so I will post pictures...

As you can tell I'm inexperienced, I need this bike working ASAP.

Bike description:
26" Standard Moutain Bike from Walmart, nothing fancy. 18 Speed.

PancakesHD

I can't upload pictures...I can't explain it well ...omg

FBOATSB 

I suggest youtube

Gaelen

Yeah, this. GCN has some good basic stuff on youtube, the Park Tool website is invaluable and if you have time to do some homework, Sheldon Brown's site explains everything in a lot of detail. You should be able to figure out if it's user error or something more with those resources.

SylvainG

Assuming you have a bike with a derailleur, check this youtube video. Should give you an idea how to put the wheel back.

JanMM

Replacing a rear wheel is indeed trickier than a front wheel. Good idea to watch videos. Might wanna wear gloves or have a rag handy to deal with chain and cassette.

Trevtassie

Did you hook the chain around the cassette (back sprocket thing), before you put the wheel in the frame?

Myosmith

coominya

Now you have been aided with the chain, let me help with the forum. there are many subforums discussing many aspects of cycling and a thread like this is best posted in the bicycle mechanics one. Just a tip for next time

vsudhir18

you have to realign the cassette gear. make sure that the wheel is installed correctly to the chain so that it is moving smoothly. the rear wheel should be seated all the way in the dropout, which means using the small screws put into the horizontal dropouts. btw the chain should be in the smallest gear when you changed your rear wheel. then you put it in the rear wheel replacement. make sure the wheel is centred when you secure it to the dropouts at the end of the forks.

scott967

This is where I think older bikes with horizontal dropouts and the chain peg on the stay had modern bikes beat.

scott s.
.

BlazingPedals

Note that the bike in question is an 18-speed mountain bike. Most likely a dept store special. There won't be anything as sophisticated as axle locating screws. On the off-chance that the rear wheel uses a quick-release skewer, OP should be aware that there's an 'open' and a 'closed' position for the lever. With the lever 'open,' hand-tighten the knurled nut on the other end, and then close the lever. Tension should be high enough that it requires some force to close the lever.

Myosmith

Hmmm . . . another new poster with an urgent problem, then *poof* when people try to help.

FBOATSB 

He/She probably calmed down enough to remember how it came off to begin with.