The bottom bracket shell is 83mm wide. But the drive-side of the shell is in the same position as a normal 73mm wide PF30 shell. The extra 10mm are all on the non-drive side. So get a good grasp of what's happening spatially and most can be made to work.
Below is what I've used successfully.
SRAM GXP (except XX1 with 156q-factor)
- Wheel Manufacturing Universal PF30 to GXP adaptor (BB/PF30 Universal Adapter for 22/24mm Spindle Cranks (SRAM/TruVativ))
- must have removable spider
- these cranksets are designed for 6mm offset direct mount chainring. use 0mm offset and you get the chainline 6mm outboard which is perfect for Ai rear end.
NOTE: this would work for Shimano cranksets too (using Shimano not GXP adapter) and chainring spacers to change the chainline or install ring on outside rather than inside of spider)
SRAM BB30 (designed for 6mm offset direct mount chainring - will have 15mm driveside BB30 spacer) (can't be 156 q-factor XX1 crank or crank will hit frame)
- remove non drive side threaded bearing preload and 5mm spacer
- use 2.5mm spacer and wavy washer (and microshims as required) for bearing preload
- again use 0mm offset chainring to move chainline out wider
SRAM BB30 (designed for 0mm offset direct mount chainring - will have 9mm driveside BB30 spacer) (156 q-factor XX1 crank is best so you don't end up with super wide q-factor)
- non-drive side crank bolt says 'do not disassemble'
- disassemble that so that you have the spindle alone. meaure (mine was 121mm)
- purchase Cannondale spindle 12mm longer. this will push the chainline 6mm wider
- install that spindle onto non-drive side crankarm
- use bb30 spacers/wavy washer as required to install the crankset on the frame
- install chainring originally designed for that crankset as your chainline is already 6mm wider for Ai rear end
NOTE: my spindle was 121mm. I purchased the 137mm Ai spindle which pushed my chainline 8mm wider. As I was using a QUARQ powermeter with 104bcd rather than a direct mount ring I could use 2mm chainring spacers to bring the chainline back 2mm to achieve the desired 6mm wider Ai chainline.
This is useful if trying to figure out what chainring offset your crank is designed for.
https://sram-cdn-pull-zone-gsdesign....patibility.pdf
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