Tried a search but not much came up and did read Sheldon Browns articles but am still a bit unclear.
Did a 8km hill yesterday, and I was struggling even on 34/26. My bike [Trek 1.5 2009] has a compact 50/34 and a 11-26 SRAM cassete. I suspect that its a mountain cassettes [came with the bike], because SRAM has only a MTB 11-26:
Now I was thinking of getting a lower geared cassette like maybe a SRAM 11-32
The Trek website shows the original cassette as a SRAM PG 950 11-26
So couple of questions:
1. Will I be able to replace the 11-26 with a 11-32 or even 11-34?
2. If possible, is it easy enough to change the cassette to use it only when I go to the hills? IOWs does it involve different length chains etc?