Really nice ergonomic bike grips, one piece design. Print in TPU (matte if you can find). You can vary the infill if you want softer or harder handles.
Inner diameter fit most bikes handle bars (~22 mm).
lots of stringing, and the print was warped on the parts that would normally have support. Overall the handles are probably usable but definitely not ideal
No supports necessary. Stringing is dependent on the filament used and not on the model, what filament did you use? You might need to reduce the speed if you get stringing.