I bought used bike with words "gear mechanism is not working and set to 6th gear only". Ok, no problem. Riding was a bit harder, but fine for quadriceps :)
Later I had a flat tire on rear/back wheel. I took the wheel away, fixed the tire and when I was putting the wheel back, and idea occured: "Why do I need to keep this non-funcional gear mechanism? Let's get rid of it!"
And now... yes. Riding is very, very easy. Like I'm on the 1st gear. And I can be fast enough. So guys, please, is there any way I can make it "harder" again without buying some expensive stuff?
Thank you for any suggestion!
2nd image: gear-mechnism found, but ...