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Yeah 46T
If you want GXP BB
No, but I don't not want it either. I don't care what the BB is so long as it fits 68mm Eng.
NHB sounds better. I want the widest range of rings to choose from, I'm not brand loyal.
carbon or alloy crank arms.
Exogram carbon crank arms vs. ? alu crank arms. Reliability, weight, price diffs?
So, I think I'm looking for this:
https://www.sigmasports.com/item/Quarq/DZero-11R-110BCD-Non-Hidden-Bolt-Road-Power-Meter-Crank-BB30/EVPUWait, that's BB30. Where's the GXP version of the NHB cranks?
This one?
https://www.sigmasports.com/item/Quarq/DZero-Exogram-11R-110BCD-GXP-Power-Meter/ENWU
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Exogram carbon crank arms vs. ? alu crank arms. Reliability, weight, price diffs?
Both reliable, price diff dunno but between 100-150 quid, weight - quite a lot. I've got an alloy DZero I use on my touring bike, and it's pretty chunky. Not a problem on the tourer, which is generally pretty chunky especially when loaded and with me sitting on it, but I wouldn't fit one on a race bike.
46t? Or are you really having a 2t difference between inners and outers?
If you want GXP BB, 46t outer (that rules out Shimano 4 bolt rings AFAIK) then you are left with the following options:
Then it's just a question of choosing your chainrings.