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Carbon Cranks
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Author:  MyNameIsDave [ Wed Aug 19, 2015 10:02 am ]
Post subject:  Carbon Cranks
Who uses them?

I've been looking at SIXC Cinch and the SRAM XX1

My BB is a SRAM PF30 OS press-in bearings, so I think either of the above will be a direct fit (maybe with some spacers for the SIXC).

They are both evenly priced. the SIXC gets top reviews, the SRAM not quite so good (according to the reviews, SRAM is slightly heavier and not as stiff).

Only negative on the SIXC is the bearing life in the BB, not meant to be great, but not sure I would have that specific problem on my setup?

Anyone use either of the above cranks?
Author:  VW-surfbum [ Wed Aug 19, 2015 10:15 am ]
Post subject:  Re: Carbon Cranks
I have the X0 which I believe that are pretty much the same as the xx1. Very light and have taken a few big rock strikes and still look as good as day 1.
No experience with the other ones so can't comment but I would go with the ones that have best warranty as with anything bike / bling related
Author:  Mattvanders [ Wed Aug 19, 2015 1:52 pm ]
Post subject:  Re: Carbon Cranks
I've got a set od sram 2200 carbon cranks (basicly manufactored listed parts/OE spec) so should be simular to XO. Did have a X9 crank set before hand, saved a fair amount of weigh by going carbon but it also helped i dropped the spider when i went 1X drive train.

As with ian, not used SIXC before so can't comment but i'm happy. Just remember crank boot covers to protect the ends from rock strikes.
Author:  MyNameIsDave [ Wed Aug 19, 2015 1:57 pm ]
Post subject:  Re: Carbon Cranks
Thanks.

The 2200 is what Spesh used.

I'm going for the XX1.
Author:  RedTwo [ Fri Aug 21, 2015 10:37 am ]
Post subject:  Re: Carbon Cranks
Same from me,
not used sixc so can't comment but am using X0 as Matt said be sure to get crank boot covers about £7 so no rock strike damage :D :thumbup:
Author:  MyNameIsDave [ Fri Aug 21, 2015 10:41 am ]
Post subject:  Re: Carbon Cranks
I ordered the XX1 with crank boots.

I will be fitting it tomorrow. I'm hoping it will be a straight swap with my existing SRAM alloy crank and I use the same spacers etc.
Author:  VW-surfbum [ Fri Aug 21, 2015 10:48 am ]
Post subject:  Re: Carbon Cranks
Be interested on the weight saving, never weighed mine against a metal set, but you can physically tell how much lighter they are.
Author:  MyNameIsDave [ Fri Aug 21, 2015 11:09 am ]
Post subject:  Re: Carbon Cranks
I'll let you know.
Author:  Mattvanders [ Fri Aug 21, 2015 1:32 pm ]
Post subject:  Re: Carbon Cranks
X9 alloy crank is meant to be 881g, XO carbon cranks is meant to be 788g. They these are both quotes for 2x setup so if you go down to 1x with a spideless ring expect drop another 100g (50g for a ring, 50g for spider) so could be closer to 688g. Will be interested in numbers as well
Author:  MyNameIsDave [ Sat Aug 22, 2015 10:57 am ]
Post subject:  Re: Carbon Cranks
SRAM Alloy (32t ring)

Image

SRAM XX1 Carbon (32t ring)

Image


I have a fitting question.

The XX1 has a shorter spindle than the alloy crank, it comes with a narrower drive side spacer.

How much movement should be taken up by the pre0load ring on the non drive side?
When I tighten in the crank, not up to spec, but enough so that there is not much left to tighten, I have about 2 to 3 mm of play in the crank. Is it normal for this amount of play to be taken up by the bearing preload ring on the non drive side?

The spacer leaves the correct amount of spindle showing.

Image
Author:  MyNameIsDave [ Sun Aug 23, 2015 6:00 pm ]
Post subject:  Re: Carbon Cranks
Quick update. Added some preload and rode them round Surrey Hills today. It's all good.
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