I bought a second hand Trek Marlin for my lad to use for school, or just hanging around with mates. It has the same gears as that, and they’re **** awful!
The other problem is, as we all love tinkering, we’ll just go “oh those gears are rubbish, I’ll just swap them over for the 9 or 10 speed stuff I have hanging around it that box….”
Well you can’t as its only 7 speed so the rear freewheel needs to be changed to accept 9 or 10 speed, but it’s screw on so the whole **** hub or wheel needs changing…..
I’d already swapped the forks over and ended up buying a new front wheel so I didn’t have to stick to QR forks. Starting to cost me a bloody fortune!