[Mini review] Shimano's 9-45t cassette seems to have flown under the radar and its REALLY good. I think this new Shimano cassette offering kinda flew under the radar. First is just because the sport got stuck in a "more big teeth on sprocket" war between SRAM and Shimano (50t then 51 then 52t). But because of how gearing works, 1t less in smallest sprocket is a bigger range jump than 1t more in the biggest. So the cassette is still 500% range even if it loses 6 teeth on the big sprocket. All you have to do is go down in chainring size to make up for it, like a 30t or 28t. The second reason is also because Shimano only "offered" this for XTdi2 and XTRdi2 derailleurs. FYI they don't always explain their cross compatibility but any medium cage derailleur (GS) from their previous cable lineup also works. And Shimano hasn't changed cages in forever. You can just buy the GS cage as a standalone part for like $20 to convert. I did this for a cabled XT derailleur I had.…