Hi y'all!
I inherited a Giant bicycle, three sprockets up front and seven in the rear, with Shimano Altus A20 shifting levers on both sides. I guess some of you folks with the budget might be snickering, but this is the very best bike I EVER owned. Problem is that for some reason, though it worked fine before we moved, after the movers delivered it, neither shifter wants to do much. The front will still switch between two sprockets, but the back is not shifting at all. If I pull on the back cable I can cause it to switch gears as long as tension is maintained.
I am guessing a good place to start is the shifters, but after opening them up I see these are a bit complex, and to guess at what should be right is not my first wish. I can not access any tech diagrams on the Shimano site and can't find any Googling - can anyone offer an alternative (If I had the spare funds I would take it to a shop, but that is not an option)?
I inherited a Giant bicycle, three sprockets up front and seven in the rear, with Shimano Altus A20 shifting levers on both sides. I guess some of you folks with the budget might be snickering, but this is the very best bike I EVER owned. Problem is that for some reason, though it worked fine before we moved, after the movers delivered it, neither shifter wants to do much. The front will still switch between two sprockets, but the back is not shifting at all. If I pull on the back cable I can cause it to switch gears as long as tension is maintained.
I am guessing a good place to start is the shifters, but after opening them up I see these are a bit complex, and to guess at what should be right is not my first wish. I can not access any tech diagrams on the Shimano site and can't find any Googling - can anyone offer an alternative (If I had the spare funds I would take it to a shop, but that is not an option)?