Originally Posted by
rhenning
Since you didn't say the name of the parts manufacturer it may be a 10 speed chain ring is thinner than a 9 speed chain ring. Roger
But it won't make a difference, since the inner chain width (roller width) of 6 to 11 speed chains is exactly the same - it's the outer width (thinner plates) that varies.
1) Bicycle chains compatibility - Cycle Gremlin