Abstract: A bicycle accessory assembly is mounted to inner and outer tubes of a bicycle frame. The outer tube is sleeved on the inner tube. The bicycle accessory assembly includes a clamp, an accessory, and a fastening unit. The clamp includes a sleeve portion sleeved on the outer tube, and first and second clamp ears connected respectively to two ends of the sleeve portion. The accessory has a connecting portion and an abutment portion. The fastening unit extends through the connecting portion and the first and second clamp ears along an axis. The fastening unit is operable to move the first clamp ear toward and away from the second clamp ear. The axis is oriented such that rotation of the accessory about the axis is prevented as a result of contact of the abutment portion with the inner tube and a top end of the inner tube.

Abstract: A bicycle accessory assembly is mounted to inner and outer tubes of a bicycle frame. The outer tube is sleeved on the inner tube. The bicycle accessory assembly includes a clamp, an accessory, and a fastening unit. The clamp includes a sleeve portion sleeved on the outer tube, and first and second clamp ears connected respectively to two ends of the sleeve portion. The accessory has a connecting portion and an abutment portion. The fastening unit extends through the connecting portion and the first and second clamp ears along an axis. The fastening unit is operable to move the first clamp ear toward and away from the second clamp ear. The axis is oriented such that rotation of the accessory about the axis is prevented as a result of contact of the abutment portion with the inner tube and a top end of the inner tube.