Gusset: plates additional into the outsides of frame tubes to fortify joints. These are definitely much more typically noticed on off highway bikes that must be sturdier. Seat rails: a metallic framework over which saddle covering is stretched. The seat publish attaches on the seat rails via a clamp Eyelet: https://archermfyqc.blogproducer.com/42199287/not-known-details-about-engine-bike-kits-ireland