Who do I put the rear wheel back on my mongoose bike

Hey, Local bike shop determined that both wheels were defective. I took the junk back to Walmart and got a refund... PROBLEM SOLVED!!

Check out https://gearly.org/ for more info.

Thanks.

First turn the adjuster on the rear brake handle all the way in and make sure the slots on the adjuster and set nut are lined up, pull the brake cable out and leave it attached to the lever to open the rear brake pads, loosen the bolts on the tire and pull the derailer up to remove the tire, remove the dustcap from tube and using a flat tool (Wal-Mart has tire tools for $1) take one side of the tire bead out of the rim, pull the old tube out, place the stem of the new tube in the hole and put the cap on, tuck the new tube in the tire trying to keep it flat as possible, push the bead of the tire back into the rim. before inflating the tire, put it back on the frame while pulling the derailer up to get the chain back on the cogs( they will adjust later) tighten the bolts and inflate the tire to desired pressure (between 35-60 psi)

Any Mongoose dealer or bicycle shop should be able to handle that or just web search for a 20" BMX wheel. It doesn't appear to be unique.

Web search "install rear wheel on bicycle" for videos

Web search for "install rear wheel on bicycle" for video help

Local bike shop determined that both wheels were defective. I took the junk back to Walmart and got a refund... PROBLEM SOLVED!!

You have to remove the entire wheel from the bike. Then change it just like you'd change a front tire... remove oneside of the tire from the rim, pull out bad tube, clean rim, put in new tube, put tire back on rim, inflat tube... good to go. There are 1,000,000 videos on YouTube to show you this process.

This is how to fix the tire:http://www.youtube.com/watch?v=pzr_RGTWWoc I unfortunately haven't seen any good videos on rear BMX wheels and tires. If you already have the wheel off, you can just follow the video and then reverse the steps you took to remove the rear wheel. If not, you will first have to make sure all the air is out of the tire. Then if there are stunt pegs on the rear you will need a deep socket that fits the wheel nut and an extension bar and ratchet wrench. The reason to have the tire flat when removing and installing the wheel is so you can get past the brake pads if you have rear brakes. If you have pegs it is easier to remove them completely so you can unhook the chain from the rear freewheel. When reinstalling the wheel, you have to apply tension to the chain by sliding the wheel back before tightening the nuts. It is easier if you center the wheel and tighten the nut on the side opposite to the freewheel just snug enough so the wheel won't move forward. Then put tension on the chain side and tighten that nut. Alternate this procedure until the wheel is centered and there is proper tension on the chain. Proper tension is when you back pedal by hand and it feels smooth not stiff and the chain does not sag.Once the wheel is installed with a new tube or both a new tube and tire you can look on the sidewall of the tire for how many pounds of air to inflate it to. I know this sounds confusing and it is tricky to do by yourself but once you've done it successfully it becomes easier each time. If you don't have the tools it is easier to have it done at a local bike shop. It is worth the money.Here are a couple more websites to search through for more information:http://www.parktool.com/repair/readhowto.asp?id=144 and http://sheldonbrown.com/gloss_e-f.html#flatland I hope this helps and please get back to me if you need more help.

try buying a new back wheel or sprocket?

If you have pegs on the back you will need a deep socket to fit the nut and a socket extender and a socket wrench. with the wheel off it is just the same as changing any other bike tire. Just make sure you check the inside of the tire carefully for anything poking through that may puncture your new tube. Also check to see if you need a new tire and make sure you inflate the repaired tire to the correct pressure or you may get a pinch flat.