What is the difference between pre-2015 Chorus vs Record cranks?

Discuss light weight issues concerning road bikes & parts.
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by Catagory6

i don't know if the 2015 update even applies to cranks, or if its just shifters/derailleurs.

obviously, i'm inquiring about 11-speed.

by Weenie

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by robertbb

Pretty sure the <2015 Chorus crank arms weren't hollow - they had some kind of foam core.

R/SR were hollow, plus the usual addition of different bearings / Ti spindle.

2015+ I'm 99% sure there is no difference whatsoever in the crank arms between C/R/SR.
It's ALL about the bike.

RobertBB's CyclePlanner Spreadsheet:
https://weightweenies.starbike.com/foru ... 8&t=152263

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by bm0p700f

Only super record has the time spindle. Record has the usb bearings and super record had cult bearings.

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by Catagory6

any significant weight difference between the chorus and the record due to the foam core?

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by AJS914

There is like a 30 gram difference between the two.

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