Originally Posted by
Bill Kapaun
The easiest (usually) change is to use a cassette with a larger big cog such as an 11-32 etc.
However, your RDER may limet the largest cog you can use. You can usually fudge a bit, but-
Let us know WHICH RDER you have. We can then better advise.
Shimano Sora 3500 came factory on the bike. I can use all 9 rear gears on both my front chain rings without any issues, I fear I just need to put more climbing miles on? I guess if it were easy everyone would be doing it right....