Originally Posted by
TejanoTrackie
I think that's a typo. I've got the RSC1 and they are 144mm BCD, although the required BB is 103mm JIS, whereas it's 110mm for the Standard model. Still, I think the finish is nicer on the Standard, which is also available in white and the chainrings are really round.
The picture on the black ring shows that it is 130 BCD. If I recall correctly, back when IRO had these rebranded they came in 130BCD as well. I'm just gonna take a guess that RSC1 refers specifically to the shape of the crank arm and then people can get it ordered however; single, double, 130bcd, 144bcd, etc.