Abstract: A folding shelf holder is strong and folds easily. A wall side member has a pin as a rotational axis of a shelf side member relative to the wall side member and a rotation limiter limiting rotation of the shelf side member relative to the wall side member. The shelf side member has a long groove for inserting the pin of the wall side member. When the folded shelf side member is opened to be approximately orthogonal to the wall side member and the shelf side member is slid toward the wall side member and in a direction where the long groove extends, the shelf side member abuts, at a back side of the pin, to the rotation limiter of the wall side member, preventing rotation of the shelf side member relative to the wall side member. Then, the shelf side member cannot fold relative to the wall side member.

Abstract: A folding shelf holder is strong and folds easily. A wall side member has a pin as a rotational axis of a shelf side member relative to the wall side member and a rotation limiter limiting rotation of the shelf side member relative to the wall side member. The shelf side member has a long groove for inserting the pin of the wall side member. When the folded shelf side member is opened to be approximately orthogonal to the wall side member and the shelf side member is slid toward the wall side member and in a direction where the long groove extends, the shelf side member abuts, at a back side of the pin, to the rotation limiter of the wall side member, preventing rotation of the shelf side member relative to the wall side member. Then, the shelf side member cannot fold relative to the wall side member.

Abstract: A bicycle crankset for mounting a plurality of chainrings includes a crank arm having a first end for mounting a pedal and a second end having a boss for mounting to a crank axle, a chainring retainer for supporting at least one of the plurality of chainrings, and a reinforcement member. The chainring retainer has a first engagement member for engaging the boss, and the reinforcement member includes a second engagement member for engaging the boss. The chainring retainer includes a first center ring defining the first engagement member and a plurality of first arms extending radially outwardly from the first center ring. Similarly, the reinforcement member includes a second center ring defining the second engagement member and a plurality of second arms extending radially outwardly from the second center ring. The distal ends of the plurality of first arms may be connected to corresponding distal ends of the plurality of second arms.

Abstract: A bicycle derailer of the type wherein a movable derailer member moves relative to another member for positioning the chain guide relative to a first sprocket and a second sprocket. An indicating member is disposed on one of the movable derailer member or the other member, and indicium is disposed on the other one of the movable member or the other member. A relative position between the indicating member and the indicium indicates a position of the chain guide relative to the first sprocket and the second sprocket. Thus, the derailer may be adjusted to a desired position by moving the chain guide so that the indicating member is set to a desired position relative to the indicium.

Abstract: A multi-speed sprocket assembly comprising at least one small diameter sprocket and at least one larger diameter sprocket. The larger diameter sprocket has at least two adjacent teeth omitted from a plurality of teeth, and a recess is formed between teeth adjacent to the omitted teeth and is directed radially inwardly of the larger diameter sprocket from the dedendum circle thereof, and a projection is formed at an intermediate portion of the recess corresponding to the bottom land between the omitted teeth and extending close to the dedendum.