HELP! My crank has died and I have no knowledge to help
I recently bought a scott aspect 970 29 inch for £40, I thought it was a bargain but it needed some work. The crank is wobbly as hell and need something fixing. I have been told its the front bearing, the bottom bracket, the lockring, everything. So today I thought i am going to fix this, went to try and take the crank arms off, but needed the removal tool, went and got one and not i need a 20 pin tool to take the bottom bracket out. Basically it wobbles like mad and screeches if you pedal wrong, there looks like there is a ring missing on the right side of the crank as there is a gap between the crank arm and frame with some threading. I have a shimano 175 fc-yr501 crankset if this is any help, please just let me know what could be wrong and if its even worth fixing, thx.