I am going to be replacing the wheelset on my bike. Instead of swapping the SRAM 12-26 9 speed cassette that is currently on my bike I am planning on replacing it with a new one. This way, if I need to swap the wheels again for any reason I can do it quickly without having to swap cassettes.
The SRAM 970 is available in the same 12-26 that is currently on my bike.
The Ultegra is available in 12-25 or 12-27.
So far, I can only find the 105 cassette in 12-25, not 12- 27.
The SRAM and Ultegra are about the same price ~ $35 -$40 while the Ultegra is about $20 more. I know the weight is different between these cassettes, but it is not much. If I need to save 30 grams, I can have a smaller bowl of cereal in the morning.
Is there much of a differnce in the longevity of these products? Is the Ultegra actually $20 better?
Any suggestions or experiences would be helpful. I do not want to spend hundreds of dollars on a new wheelset and then screw up by trying to save $20 on a cassette.