I have the shimano sis rear derailleur which needs fixing. I took it off the wheel while I was fixing the puncture in the rear wheel. Now I am not able to fix it. It keeps coming off when I am pedaling especially while going on the hills.
As you can see the fitting end is not a ring. So it comes off easily. Also there is small bolt, not sure what it name is, is blocking the derailiuer going fully into the axle.
I need help please. Until this is fixed, I cant use the bike.
Thanks in advance.