Bike Reviews

i just recently bought this mountain bike and it is working good but the disc brakes need a bit of adjusting i think. this is the first time i got disc brake bikes and don’t know much about them. the problem is that the brake pads have contact with the disc or the rotor when i spin the wheel. it doesn’t spin freely and spin slow. also i checked that the disc is a bit to the left in the caliper. i tried to loosen but it didn’t even move. can you guys help me or possibly give me a guide?
thankyou.

Please someone help me to do wheelies on a normal mountain bike with no gears and disk brakes

I have a mountain bike with frame mounted brakes. The rear brakes have always made a loud squeak even when I replace the pads.

It sounds like a semi-truck coming to a stop when I squeeze my back disk brakes on my mountain bike. Is there a way I can make that go away without compromising their braking ability?