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Hi, I have a Merida Big Nine 100 2015. I know fuck-all about bikes but I need help.
First thing: My gears keep slipping and take a lot of time to change. For example if I am in 7th gear and I pedal hard, it makes a strange noise and can even change to 6th or 8th at times.
Second, I let my idiot step dad use the bike and he pumped up the tire without my permission. He pumped it too much and the (I think it's called a valve stem) came off and cracked. He sealed it with soap and it seems like a good temporary solution but I want to fix it properly.
Can anyone help?
