If you're derialluer hanger is bent and you want a stronger hanger then the one that came with the bike. Wheels Manufacturing is one that I highly recommend to keeping your derailleur aligned with your gears.
Look for your design at https://wheelsmfg.com/derailleur-hang...
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Just keep in mind these simple tasks when changing gears.

1) As your pedalling click the appropriate shifter to make it easier or harder to pedal.
2) Keep the chain as straight as possible.
3) Never change gears uphill to avoid applying to much pressure on the chain.(It could break off)

Remember, Higher numbers on left you should be at high numbers on the right. And of course Lower numbers on left, you should be at lower numbers on right.

Do this and your bike will last longer.

*TIP.. If you ride. Like A LOT. You should replace your chain every 3-6 months(depending on how hard you ride). Your sprockets will last longer, without replacing them... Wait too long, and you'll have to change your chain, and sprockets(rear cogs).

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