I bought my schiwinn world sport road bike few days ago.
And whenever i'm riding my bike, either it's downhill or uphill or straight, the derailleur makes rattling sound.
I'm not exactly sure if it's from there, but when i highered my bike and listened to the sound carefully, the sound came from there. THe sound might come from the chain...idk..(i put grease to get rid of the sound, but didn't work out)
How should i get rid of the sound? do i have to replace the derailleur?
OH! and the gear slips off when i try to start pedaling from the stop. ( it was first gear, but when i tried to pedal, it changes to higher gear.)