To short. For kids bike.Adjusted rollers to furthest setting but it is too short for my adult Ten Speed bike.Seems to be good quality.I wish the description was more accurate or more detailed in the use of this.The rollers did not turn easily, seems the sealed bearings were too tight. Was not able to ride even at the lightest gear. Added a drop of chain oil and it helped a bit. Then had to loosen every nut pressing the bearings and they rolled easily. Too tight from the factory and instructions say not to adjust inner roller nuts.