this is a custom Trek 4500 handlebar cap designed for the 2002 Trek 4500 SL. it might work for older or newer 4500's (not too new, like 2015). I suggest a normal support setting, because it comes out better than with tree support. print in either PLA or sun resistant PETG, if you leave your 4500 outside, but it comes out great in PLA. don't screw too tight into the cap area, or it will break. infill should be around 40%. 

hope you guys who downloads this cap like it!