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Discussion Starter · #1 ·
Please help, I can't seem to understand dub crank/bb compatibility.
The frame has 83mm PF30 bb (Cannondale scalpel SE 2021 ai boost 55mm chainline).

All the ai cranks I see either don't state axle/bb/hub compatibility or state 73mm/89.5mm/91.5mm bb shell width. Some state 148mm hub but miss on bb width...
So theese are not campatible with my frame/bb?
Do I need longer axle/spindle crankset?
 

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Never trust a fart
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What crank are you specifically looking at? Personally I'd ditch the Sram stuff and get some Hollowgrams.

The Ai spacing really throws everything up in the air. It's best to consult with your local Cannondale dealer for selecting the correct crank.
 

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Discussion Starter · #3 · (Edited)
What crank are you specifically looking at? Personally I'd ditch the Sram stuff and get some Hollowgrams.

The Ai spacing really throws everything up in the air. It's best to consult with your local Cannondale dealer for selecting the correct crank.
I am looking at XX1 or Stylo Ai specific options.
Hollowgramms are another option but seems even more expensive and even harder to accquire.

Not much help to be expected from our local dealer.

Considering Hollowgramm cranks - what spindle lenght do I need? 137mm?
 
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