On the Focus Paralane all-weather commuting bike, I had already upgraded most of the groupset to a 12 speed Dura-Ace system. Only one component was missing, and it was the 12 speed crankset. Due to production delays, I was not able to get the crankset at the same time as the rest of the components.
During Phase 1 of this upgrade, all the components have been changed to the latest Dura-Ace R9200 groupset, except for this crankset. Even so, there is no issue with using the older R9100 crankset in the 12 speed drivetrain, as they are mostly compatible, although you may not get 100% of the function.
Now that I have this 12 speed R9200 crankset, I can complete the upgrade in Phase 2 of this project.
Unboxing the new Dura-Ace R9200 crankset! New packaging design for Dura-Ace.
I chose the 50-34T chain ring combination, and a crank arm length of 165 mm. According to my own experience and also bike fitting, this length is good for me.
Most of the box is actually just air, as the crankset has a shape that takes up quite a bit of space.
Right crankarm with chain rings and chain ring bolts weigh 482 grams.
Right crankarm only is 341 grams, quite a bit more than the previous 9000 and R9100 construction.
One change to the spindle is the addition of a plastic cap inside, to prevent water from making its way through the spindle into the crank arm on the other end, which can cause corrosion from the inside.
Hollowglide 50T outer chain ring is 107 grams.
Aluminium 34T inner chain ring is 30 grams.
4x aluminium chain ring bolts are 5 grams in total.
R9200 left crank arm! Glossy finishing.
Super shiny and free of scratches when new.
Left crank arm, at 165 mm length weighs 197 grams.
New shorter crank arm fixing bolt is 3 grams. This is packed separately in a small paper bag, don't throw it out accidentally!
In total, this Dura-Ace R9200 crankset weighs 682 grams. This is quite a bit heavier than the previous generation R9100 crankset, which is just 610 grams! The old crankset weighs 72 grams less and is 10% lighter, which is a huge difference for Dura-Ace.
What I understand is that the additional weight comes from thicker walls for better strength and durability. The rigidity is probably improved as well from the extra material.
That said, a normal cyclist like me will not be able to put out enough power to detect any difference in stiffness. If you are looking for a weight weenie crankset, this R9200 crankset is not ideal, as there are other options that are lighter.
Nevertheless, it would complete the 12 speed Dura-Ace groupset on the Focus Paralane, despite the weight increase.
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