So, upon having bent the 24t cog on my 1.5 yr old 990 cassette, I have to replace it (yes, I corrected it, only to have it bend back within a mile).
What is more durable? I see only minimal (5g or so) weight difference between same geared cassettes in their lineup - which one is less likely to suffer the same fate?
990 - 5 arms on the alloy spider, steel rings (5 on spider), 275g for 11-32
980 - 5 arms on the alloy spider, steel rings (3 on spider), 280g for 11-32
970 - ? no spider (they provide no pics), steel rings, 330g for 11-32
FWIW, I just replaced the chain/middle chainring 25mi ago (XTR chain and RF 34 chainring), so this will be a basically new drivetrain. Running 07 X.9 shifters and X.9 med-cage rear der.
Thanks for the feedback/direction!
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