Middle chainring question!

[theclaud]

I've got a bbb "roundabout" middle chainring - it doesn't seem to have one of those little nobbles that you line up with the crankarm. Does this mean it doesn't matter which way round you install it (rotationally, I mean - I'm not intending to try it back-to-front)?

Thanks!

 

[Landslide]

Looking at piccies, your chainring would appear not to have shift-ramps etc, so I'd say no it doesn't matter.

 

[theclaud]

Cool. This one has got pins and machined ramps, but they're regularly arranged. I've stared at it for ages, and can't see any difference however I rotate it, so I'll give it a go. Will report back if it doesn't work. Thanks 'slide.