Here are presented the caps in the style of "bullet" for wheel rims Great Wall M2 / M4 with DIA 54,1 mm (this size also used Toyota (Bb/Scion Xb), some Opel, etc.),
I printed for myself two versions of caps - V1A "bullet style" and V3B with individual bolts another color, then "chrome color" painting.
V2B and V3B use the same bolts.
P.S. Also I recommend using spring rings from original caps
P.P.S. All files tested in Netfabb
Printing nozzle - 0.4mm, layer thikness - 0.1mm,