Shimano sora r3030 9 speed braze on front mechthe shimano sora r3030 9 speed braze on front mech provides robust durability stylish and clean design technology adopted from higher level groupsets and all at an affordable price this particular mechanism is specifically designed for 3x9 gearing its easy to use light action makes it ideal for use on your commuter touring or winter training bike features for 9 speed drivetrains recommended for triple chainsets only maximum top sprocket 50t tot