A manufacturing method for a fibrous composite bicycle rim, and a tool having two molding devices and one circular device. The two molding devices each have one flank contact surface. A molding device is selected and a matching auxiliary molding part is connected therewith, forming a mold surface for the rim base. A first fiber composite layer is applied to the molding device and the auxiliary molding part. The other molding device is covered with a first fiber composite layer, forming the layer of the other rim flank. A circular device is formed of annular segments has a circumferential rim well contact surface and is covered by a first fiber layer, which forms the rim well. The circular device and the molding devices are connected. The fibrous composite material is allowed to set, the annular segments and the molding devices are removed, and the rim is taken out.

Disclosed is a soft tube of a sheet conveying portion of a sheet conveying roller, including: a region with irregularities in an outer peripheral surface of the soft tube. The region has a root mean square slope Sdq within a range of 0.03 to 0.50.