What is the most practical way to convert 105's 9spd 12-23 cassette to 9spd 12-28 or something like that?
- One option is to buy Ultegra 12-27... Cost ~$50
- Another one is to buy something like SRAM PG-950 11-32, take 24 and 28 sprockets and replace 16 and 23 sprockets on the 12-23... The issue here is that I am not sure that PG-950 can be taken apart... Cost ~$20
- Anything else?