"New" chainset - minty has moved forward from 970 to 980.
I much prefer the look, 980 matches the silvery x design of the derailleurs, whereas 970 is a bit "commuter grey"
Getting "x"-ier by the year.
Mechanically speaking, the 970 had a funny splined end like Octalink, needed a special tool to remove a flimsy plastic collar, and then screw in to use the crank fixing bolt as an extractor on the left hand crank...
Lucky it's there in one of the shop's 4 boxes of crank extractors
But i may never need it again
.
The 980 is standard ht2 fitting
Unfortunately I've lost the 44t ring, 980 is 42 only
(we are getting puny)
- it's also 10 speed dyna-sys, but it set up perfectly on my 9 speed 970 f.mech and 950 lever.
I've got a feeling 11 speed front spacing is wider, but 9&10 the same.