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Chainring offset measurements - How is it measured

4.8K views 1 reply 2 participants last post by  White7  
#1 ·
I would like to optimize my chainline and run Absolute black oval ring
Currently it has SRAM direct mount 0 offset and the chainline is a bit too far away from the center of fram and makes some noise when on the largest cog but does not skip nor fall off.

Bike is a F29 Lefty 2012 with sram 1x10 (current 0 offset direct drive xsync chainring)

QUESTION:
How are AB (or other) Chainring offset measured ?
Everyone assumes that its measured from contact face of chainring to the crankarm, to the center of the chainline (chainring tooth) but i think thats not accurate and hence i want to confirm.
 
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