I want to adjust it becuase the place I got my mountain bike from didnt adjust anything.
I have a 21 speed bike. The gears in the rear-- 1st,2nd, and 3rd are fine but then when I attempt to switch into 4th it changes gears twice. So its in 6th and when I change to 7th..... there is none
For the front gears...... 1st just works (gets into gear-- it hesitates to) and then 2nd doesnt do anything (the chain just rubs the cage-- and I have to switch to the non existant gear to stop it from rubbing) and there is no 3rd gear.
Already did the brake but not the front disc brake.. Help on that as well.