Originally Posted by
ZiP0082
Some track bikes and some BMX bikes ship with 1/8, but I'm willing to bet your bike is 3/32. Like you said, it is very standard. Even if you did have a 1/8 chain, you could still run it on a 3/32 chainring (but can't do it the other way around).
Also, you probably know this but BCD is the distance between two adjacent chainring holes. You'd want to make sure your current cranks have either 130mm or 110mm between each crank arm/hole before considering a rocket chainring.
Bolt Circle Diameter so the distance between adjacent holes is not the diameter as line does not pass through the center of the circle that has all of the bolt holes on its circumference. I think Sheldon has a conversion from measuring between adjacent holes and finding the BCD.
Rocket Rings should take both 110BCD and 130BCD