#declare TyrePair= union{object{ThornyTire rotate y*180 scale 10} 
                         object{ThornyTire rotate y*180 scale 10 translate <0,0,42.75>}} 
                         

#declare MagicWand=cylinder {<15,0,37>,<46.35,0,27.5>,.5 texture {MyChrome}}  // steer stem
#declare SeatPostTop=cylinder {<45,0,6>,<41,0,7>,.5 texture {MyChrome}}  //seatpost