which boomerang?

[shiversc120]

Which one of these boomerangs mount on the bb instead of the frame?

http://www.warhawkindustries.com/estore/drivetrain/product.php?productid=16169
http://www.warhawkindustries.com/estore/drivetrain/product.php?productid=16170

[DangerousDean]

take the one behind door number one

[nickschwarzmiller]

THe first one mounts to the bb the second one the iscg the international standard chain guide which mounts to the frame.

[shiversc120]

thanks

[BAC5.2]

ISCG = International Standard Chain Guide. Always refers to frames.