Hello,

Recently I bought a very cheap mountain bike. I want to clean and repair it so I can ride it.

Started with some basic cleaning and escalated a bit..

Took off the chain to clean it properly.

Changed the outer and inner tires.

Took off the cassette and cleaned it.

Changed the bearing balls of the rear wheel because the wheel was wobbling from the axle.

Dismantled the derailleur to clean it.

  1. Now the rear wheel doesn't spin for long on its own. I look up closely and it does not touch the frame or brake pads anywhere so it cannot be that. I wondering what could the issue be. I have attached a video.

  2. The wheels on the derailleur are wobbly and that's how they were from the very beginning. Is that fixable? Or do I need to buy new derailleur? Or maybe buy a whole new bike šŸ¤”šŸ˜

derailleur photos

Edit: added photos link

Bike repair questions
byu/Ridiculous4th inbicycling



by Ridiculous4th

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4 Comments

  1. locomotive_trooper on

    Hi bro, your rear wheel nuts or conos as we call it in spanish here are too tight. Take as reference that the wheel needs to spin freely in your hand holding it from both axles sides, and the axle itself doesnt have to move or have play if you try to do it with your hand, only spin

    About rear derailleur wheels, most of them has movement and it’s completely normal, even more if it’s a cheap derailleur. Try to backpedal when you have your chain on, if chain doesn’t fall off from jockey and tension wheel and it doesn’t make chain skip or jump when you pedal forward it’s ok.
    Hope it helps

  2. Wheel axle should spin freely when off the bike. It should have a little bit of “wiggle” that goes away when the axle nuts are tightened.

  3. You need to rebuild the rear hubs, that’s cleaning and re greasing.

    check if the pawls isn’t damage, if not it’s better to replace just the spring of it, so it will stay intact.

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