Now that SRAM has announced its NX Eagle 12 speed cassette, you can go ALL SRAM on your old bike without searching for a XD driver for your hub. Previously, the only route to do this was to use a SunRace 12 speed cassette, but now SRAM is sramming (sic) the door on the Taiwanese manufacturer.
A quick note for those looking to retrofit a 12 speed cassette onto their 8/9/10 Shimano freehub body/driver. Other than the 29 grams in weight, the difference between the SRAM NX Eagle and the SunRace MZ90 is in the 6th & 7th gear â€“ there is Â a slight difference in the teeth count.
SRAM NX Eagle PG1230 (Easier/Slower mid-range) 615g
SunRace CSMZ90 (Harder/Faster mid-range) 586g
Maybe the SRAM is smoother than the SunRace? Maybe the SunRace is closer to the XD hub ratio? Until somebody puts both cassettes on exact same bikes and rides them for a 100 miles side by side, we wouldn’t know the difference in performance.
But the BIGGEST DIFFERENCE is that the SunRace CSMZ90 is AVAILABLE NOW and the SRAM NX Eagle PG-1230 won’t be in anybody’s inventory until September – That’s the end of the season for a lot of us in the midwest. Coincidentally, the new Shimano M9100 will not get to local dealers until September either.